245 files changed, 267 insertions, 524 deletions

diff --git a/setup.py b/setup.py
index 2d182cdc7..c31817b9a 100644
--- a/setup.py
+++ b/setup.py
@@ -101,15 +101,16 @@ case second `m'.  Any other spelling is incorrect.""",
     include_package_data = True,
     entry_points    = {
         'console_scripts' : list(scripts),
-        'flake8.extension': ['B4 = mailman.testing.flake8:ImportOrder'],
         },
     install_requires = [
         'aiosmtpd',
         'alembic',
+        'atpublic',
         'falcon>=1.0.0rc1',
         'flufl.bounce',
         'flufl.i18n',
         'flufl.lock',
+        'flufl.testing',
         'httplib2',
         'lazr.config',
         'nose2',
diff --git a/src/mailman/__init__.py b/src/mailman/__init__.py
index c54830915..15ce69608 100644
--- a/src/mailman/__init__.py
+++ b/src/mailman/__init__.py
@@ -29,20 +29,6 @@ except ImportError:                                 # pragma: no cover
     __path__ = pkgutil.extend_path(__path__, __name__)
 
 
-# I hate myself: http://bugs.python.org/issue26632
-def public(thing=None, **kws):
-    mdict = (sys._getframe(1).f_globals
-             if thing is None
-             else sys.modules[thing.__module__].__dict__)
-    dunder_all = mdict.setdefault('__all__', [])
-    if thing is not None:
-        dunder_all.append(thing.__name__)
-    for key, value in kws.items():
-        dunder_all.append(key)
-        mdict[key] = value
-    return thing
-
-
 # We have to initialize the i18n subsystem before anything else happens,
 # however, we'll initialize it differently for tests.  We have to do it this
 # early so that module contents is set up before anything that needs it is
diff --git a/src/mailman/app/bounces.py b/src/mailman/app/bounces.py
index 98076dc9b..7fcbe4c2a 100644
--- a/src/mailman/app/bounces.py
+++ b/src/mailman/app/bounces.py
@@ -24,7 +24,6 @@ import logging
 from email.mime.message import MIMEMessage
 from email.mime.text import MIMEText
 from email.utils import parseaddr
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.email.message import OwnerNotification, UserNotification
@@ -35,6 +34,7 @@ from mailman.interfaces.subscriptions import ISubscriptionService
 from mailman.interfaces.template import ITemplateLoader
 from mailman.utilities.email import split_email
 from mailman.utilities.string import expand, oneline, wrap
+from public import public
 from string import Template
 from zope.component import getUtility
 from zope.interface import implementer
diff --git a/src/mailman/app/commands.py b/src/mailman/app/commands.py
index 4c484bc0b..093156d78 100644
--- a/src/mailman/app/commands.py
+++ b/src/mailman/app/commands.py
@@ -17,10 +17,10 @@
 
 """Initialize the email commands."""
 
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.command import IEmailCommand
 from mailman.utilities.modules import find_components
+from public import public
 from zope.interface.verify import verifyObject
 
 
diff --git a/src/mailman/app/digests.py b/src/mailman/app/digests.py
index 0d47df328..409c22125 100644
--- a/src/mailman/app/digests.py
+++ b/src/mailman/app/digests.py
@@ -19,11 +19,11 @@
 
 import os
 
-from mailman import public
 from mailman.config import config
 from mailman.email.message import Message
 from mailman.interfaces.digests import DigestFrequency
 from mailman.utilities.datetime import now as right_now
+from public import public
 
 
 @public
diff --git a/src/mailman/app/domain.py b/src/mailman/app/domain.py
index 66abf9c3e..33546d34a 100644
--- a/src/mailman/app/domain.py
+++ b/src/mailman/app/domain.py
@@ -17,9 +17,9 @@
 
 """Application level domain support."""
 
-from mailman import public
 from mailman.interfaces.domain import DomainDeletingEvent
 from mailman.interfaces.listmanager import IListManager
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/app/events.py b/src/mailman/app/events.py
index f3323b6ce..c7d4857cb 100644
--- a/src/mailman/app/events.py
+++ b/src/mailman/app/events.py
@@ -17,12 +17,12 @@
 
 """Global events."""
 
-from mailman import public
 from mailman.app import domain, membership, moderator, subscriptions
 from mailman.core import i18n, switchboard
 from mailman.languages import manager as language_manager
 from mailman.styles import manager as style_manager
 from mailman.utilities import passwords
+from public import public
 from zope import event
 
 
diff --git a/src/mailman/app/inject.py b/src/mailman/app/inject.py
index decc0fd0e..ca03942ea 100644
--- a/src/mailman/app/inject.py
+++ b/src/mailman/app/inject.py
@@ -19,10 +19,10 @@
 
 from email import message_from_string
 from email.utils import formatdate, make_msgid
-from mailman import public
 from mailman.config import config
 from mailman.email.message import Message
 from mailman.utilities.email import add_message_hash
+from public import public
 
 
 @public
diff --git a/src/mailman/app/lifecycle.py b/src/mailman/app/lifecycle.py
index 50145ce8f..ccd3e4b35 100644
--- a/src/mailman/app/lifecycle.py
+++ b/src/mailman/app/lifecycle.py
@@ -21,7 +21,6 @@ import shutil
 import logging
 
 from contextlib import suppress
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.address import IEmailValidator
 from mailman.interfaces.domain import (
@@ -31,6 +30,7 @@ from mailman.interfaces.member import MemberRole
 from mailman.interfaces.styles import IStyleManager
 from mailman.interfaces.usermanager import IUserManager
 from mailman.utilities.modules import call_name
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/app/membership.py b/src/mailman/app/membership.py
index 534eed15d..5eb15cf30 100644
--- a/src/mailman/app/membership.py
+++ b/src/mailman/app/membership.py
@@ -18,7 +18,6 @@
 """Application support for membership management."""
 
 from email.utils import formataddr
-from mailman import public
 from mailman.app.notifications import (
     send_admin_subscription_notice, send_goodbye_message,
     send_welcome_message)
@@ -33,6 +32,7 @@ from mailman.interfaces.template import ITemplateLoader
 from mailman.interfaces.user import IUser
 from mailman.interfaces.usermanager import IUserManager
 from mailman.utilities.string import expand
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/app/moderator.py b/src/mailman/app/moderator.py
index 9d3856f33..fe7a81383 100644
--- a/src/mailman/app/moderator.py
+++ b/src/mailman/app/moderator.py
@@ -21,7 +21,6 @@ import time
 import logging
 
 from email.utils import formatdate, getaddresses, make_msgid
-from mailman import public
 from mailman.app.membership import delete_member
 from mailman.config import config
 from mailman.core.i18n import _
@@ -34,6 +33,7 @@ from mailman.interfaces.requests import IListRequests, RequestType
 from mailman.interfaces.template import ITemplateLoader
 from mailman.utilities.datetime import now
 from mailman.utilities.string import expand, wrap
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/app/notifications.py b/src/mailman/app/notifications.py
index 31a15d820..4d5c1be12 100644
--- a/src/mailman/app/notifications.py
+++ b/src/mailman/app/notifications.py
@@ -21,13 +21,13 @@ import logging
 
 from email.utils import formataddr
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.email.message import OwnerNotification, UserNotification
 from mailman.interfaces.member import DeliveryMode
 from mailman.interfaces.template import ITemplateLoader
 from mailman.utilities.string import expand, wrap
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/app/replybot.py b/src/mailman/app/replybot.py
index fc911c5a1..f707fec89 100644
--- a/src/mailman/app/replybot.py
+++ b/src/mailman/app/replybot.py
@@ -17,7 +17,7 @@
 
 """Application level auto-reply code."""
 
-from mailman import public
+from public import public
 
 
 @public
diff --git a/src/mailman/app/subscriptions.py b/src/mailman/app/subscriptions.py
index f88a967c2..a38b3061d 100644
--- a/src/mailman/app/subscriptions.py
+++ b/src/mailman/app/subscriptions.py
@@ -23,7 +23,6 @@ import logging
 from datetime import timedelta
 from email.utils import formataddr
 from enum import Enum
-from mailman import public
 from mailman.app.membership import delete_member
 from mailman.app.workflow import Workflow
 from mailman.core.i18n import _
@@ -45,6 +44,7 @@ from mailman.interfaces.usermanager import IUserManager
 from mailman.interfaces.workflow import IWorkflowStateManager
 from mailman.utilities.datetime import now
 from mailman.utilities.string import expand, wrap
+from public import public
 from zope.component import getUtility
 from zope.event import notify
 from zope.interface import implementer
diff --git a/src/mailman/app/workflow.py b/src/mailman/app/workflow.py
index cd9124993..e11ae03cf 100644
--- a/src/mailman/app/workflow.py
+++ b/src/mailman/app/workflow.py
@@ -22,8 +22,8 @@ import json
 import logging
 
 from collections import deque
-from mailman import public
 from mailman.interfaces.workflow import IWorkflowStateManager
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/archiving/mailarchive.py b/src/mailman/archiving/mailarchive.py
index 782cec29a..bd1a34580 100644
--- a/src/mailman/archiving/mailarchive.py
+++ b/src/mailman/archiving/mailarchive.py
@@ -17,10 +17,10 @@
 
 """The Mail-Archive.com archiver."""
 
-from mailman import public
 from mailman.config import config
 from mailman.config.config import external_configuration
 from mailman.interfaces.archiver import ArchivePolicy, IArchiver
+from public import public
 from urllib.parse import quote, urljoin
 from zope.interface import implementer
 
diff --git a/src/mailman/archiving/mhonarc.py b/src/mailman/archiving/mhonarc.py
index 857a61e06..80cba043b 100644
--- a/src/mailman/archiving/mhonarc.py
+++ b/src/mailman/archiving/mhonarc.py
@@ -19,11 +19,11 @@
 
 import logging
 
-from mailman import public
 from mailman.config import config
 from mailman.config.config import external_configuration
 from mailman.interfaces.archiver import IArchiver
 from mailman.utilities.string import expand
+from public import public
 from subprocess import PIPE, Popen
 from urllib.parse import urljoin
 from zope.interface import implementer
diff --git a/src/mailman/archiving/prototype.py b/src/mailman/archiving/prototype.py
index 9790129da..b37bfa61e 100644
--- a/src/mailman/archiving/prototype.py
+++ b/src/mailman/archiving/prototype.py
@@ -24,9 +24,9 @@ from contextlib import suppress
 from datetime import timedelta
 from flufl.lock import Lock, TimeOutError
 from mailbox import Maildir
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.archiver import IArchiver
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/bin/mailman.py b/src/mailman/bin/mailman.py
index b4d144b7c..3f8f66d6e 100644
--- a/src/mailman/bin/mailman.py
+++ b/src/mailman/bin/mailman.py
@@ -21,13 +21,13 @@ import os
 import argparse
 
 from functools import cmp_to_key
-from mailman import public
 from mailman.core.i18n import _
 from mailman.core.initialize import initialize
 from mailman.database.transaction import transaction
 from mailman.interfaces.command import ICLISubCommand
 from mailman.utilities.modules import find_components
 from mailman.version import MAILMAN_VERSION_FULL
+from public import public
 from zope.interface.verify import verifyObject
 
 
diff --git a/src/mailman/bin/master.py b/src/mailman/bin/master.py
index 8e0b1265f..3acff1fc8 100644
--- a/src/mailman/bin/master.py
+++ b/src/mailman/bin/master.py
@@ -28,11 +28,11 @@ from datetime import timedelta
 from enum import Enum
 from flufl.lock import Lock, NotLockedError, TimeOutError
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.core.logging import reopen
 from mailman.utilities.options import Options
+from public import public
 
 
 DOT = '.'
diff --git a/src/mailman/bin/runner.py b/src/mailman/bin/runner.py
index 591f5ee31..39e1e9105 100644
--- a/src/mailman/bin/runner.py
+++ b/src/mailman/bin/runner.py
@@ -24,12 +24,12 @@ import logging
 import argparse
 import traceback
 
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.core.initialize import initialize
 from mailman.utilities.modules import find_name
 from mailman.version import MAILMAN_VERSION_FULL
+from public import public
 
 
 log = None
diff --git a/src/mailman/chains/accept.py b/src/mailman/chains/accept.py
index 8b0a0507e..c245927bf 100644
--- a/src/mailman/chains/accept.py
+++ b/src/mailman/chains/accept.py
@@ -19,11 +19,11 @@
 
 import logging
 
-from mailman import public
 from mailman.chains.base import TerminalChainBase
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.chain import AcceptEvent
+from public import public
 from zope.event import notify
 
 
diff --git a/src/mailman/chains/base.py b/src/mailman/chains/base.py
index 677ec501c..d54baf8b6 100644
--- a/src/mailman/chains/base.py
+++ b/src/mailman/chains/base.py
@@ -17,11 +17,11 @@
 
 """Base class for terminal chains."""
 
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.chain import (
     IChain, IChainIterator, IChainLink, IMutableChain, LinkAction)
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/chains/builtin.py b/src/mailman/chains/builtin.py
index b805fca0f..16de1043a 100644
--- a/src/mailman/chains/builtin.py
+++ b/src/mailman/chains/builtin.py
@@ -19,10 +19,10 @@
 
 import logging
 
-from mailman import public
 from mailman.chains.base import Link
 from mailman.core.i18n import _
 from mailman.interfaces.chain import IChain, LinkAction
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/chains/discard.py b/src/mailman/chains/discard.py
index f77c7eb0f..e9fc8d05d 100644
--- a/src/mailman/chains/discard.py
+++ b/src/mailman/chains/discard.py
@@ -19,10 +19,10 @@
 
 import logging
 
-from mailman import public
 from mailman.chains.base import TerminalChainBase
 from mailman.core.i18n import _
 from mailman.interfaces.chain import DiscardEvent
+from public import public
 from zope.event import notify
 
 
diff --git a/src/mailman/chains/headers.py b/src/mailman/chains/headers.py
index 5698740d3..56ac179e9 100644
--- a/src/mailman/chains/headers.py
+++ b/src/mailman/chains/headers.py
@@ -21,12 +21,12 @@ import re
 import logging
 
 from itertools import count
-from mailman import public
 from mailman.chains.base import Chain, Link
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.chain import LinkAction
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/chains/hold.py b/src/mailman/chains/hold.py
index 42fed66a6..0b50964b7 100644
--- a/src/mailman/chains/hold.py
+++ b/src/mailman/chains/hold.py
@@ -22,7 +22,6 @@ import logging
 from email.mime.message import MIMEMessage
 from email.mime.text import MIMEText
 from email.utils import formatdate, make_msgid
-from mailman import public
 from mailman.app.moderator import hold_message
 from mailman.app.replybot import can_acknowledge
 from mailman.chains.base import TerminalChainBase
@@ -36,6 +35,7 @@ from mailman.interfaces.pending import IPendable, IPendings
 from mailman.interfaces.template import ITemplateLoader
 from mailman.interfaces.usermanager import IUserManager
 from mailman.utilities.string import expand, oneline, wrap
+from public import public
 from zope.component import getUtility
 from zope.event import notify
 from zope.interface import implementer
diff --git a/src/mailman/chains/moderation.py b/src/mailman/chains/moderation.py
index 9bb4bf0d5..e8f507603 100644
--- a/src/mailman/chains/moderation.py
+++ b/src/mailman/chains/moderation.py
@@ -34,11 +34,11 @@ made as to the disposition of the message.  `defer` is the default for
 members, while `hold` is the default for nonmembers.
 """
 
-from mailman import public
 from mailman.chains.base import Link
 from mailman.core.i18n import _
 from mailman.interfaces.action import Action
 from mailman.interfaces.chain import IChain, LinkAction
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/chains/owner.py b/src/mailman/chains/owner.py
index f7454435f..4fb8e1723 100644
--- a/src/mailman/chains/owner.py
+++ b/src/mailman/chains/owner.py
@@ -19,11 +19,11 @@
 
 import logging
 
-from mailman import public
 from mailman.chains.base import TerminalChainBase
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.chain import AcceptOwnerEvent
+from public import public
 from zope.event import notify
 
 
diff --git a/src/mailman/chains/reject.py b/src/mailman/chains/reject.py
index 27fce8d4e..96be8f2de 100644
--- a/src/mailman/chains/reject.py
+++ b/src/mailman/chains/reject.py
@@ -19,12 +19,12 @@
 
 import logging
 
-from mailman import public
 from mailman.app.bounces import bounce_message
 from mailman.chains.base import TerminalChainBase
 from mailman.core.i18n import _
 from mailman.interfaces.chain import RejectEvent
 from mailman.interfaces.pipeline import RejectMessage
+from public import public
 from zope.event import notify
 
 
diff --git a/src/mailman/commands/cli_aliases.py b/src/mailman/commands/cli_aliases.py
index 76713555a..f48814854 100644
--- a/src/mailman/commands/cli_aliases.py
+++ b/src/mailman/commands/cli_aliases.py
@@ -17,11 +17,11 @@
 
 """Generate Mailman alias files for your MTA."""
 
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
 from mailman.utilities.modules import call_name
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/cli_conf.py b/src/mailman/commands/cli_conf.py
index 67db4ac53..0a00f5006 100644
--- a/src/mailman/commands/cli_conf.py
+++ b/src/mailman/commands/cli_conf.py
@@ -21,10 +21,10 @@ import sys
 
 from contextlib import closing
 from lazr.config._config import Section
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/cli_control.py b/src/mailman/commands/cli_control.py
index 5ba0b5427..846f4a5c6 100644
--- a/src/mailman/commands/cli_control.py
+++ b/src/mailman/commands/cli_control.py
@@ -23,11 +23,11 @@ import errno
 import signal
 import logging
 
-from mailman import public
 from mailman.bin.master import WatcherState, master_state
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/cli_digests.py b/src/mailman/commands/cli_digests.py
index 3a4d6614f..151a9332c 100644
--- a/src/mailman/commands/cli_digests.py
+++ b/src/mailman/commands/cli_digests.py
@@ -19,12 +19,12 @@
 
 import sys
 
-from mailman import public
 from mailman.app.digests import (
     bump_digest_number_and_volume, maybe_send_digest_now)
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
 from mailman.interfaces.listmanager import IListManager
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/commands/cli_help.py b/src/mailman/commands/cli_help.py
index 9222cd00f..5d6372e51 100644
--- a/src/mailman/commands/cli_help.py
+++ b/src/mailman/commands/cli_help.py
@@ -17,8 +17,8 @@
 
 """The 'help' subcommand."""
 
-from mailman import public
 from mailman.interfaces.command import ICLISubCommand
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/cli_import.py b/src/mailman/commands/cli_import.py
index 126c026d0..d9384b5bc 100644
--- a/src/mailman/commands/cli_import.py
+++ b/src/mailman/commands/cli_import.py
@@ -21,12 +21,12 @@ import sys
 import pickle
 
 from contextlib import ExitStack, contextmanager
-from mailman import public
 from mailman.core.i18n import _
 from mailman.database.transaction import transactional
 from mailman.interfaces.command import ICLISubCommand
 from mailman.interfaces.listmanager import IListManager
 from mailman.utilities.importer import Import21Error, import_config_pck
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/commands/cli_info.py b/src/mailman/commands/cli_info.py
index fd6c83f88..46643ae1d 100644
--- a/src/mailman/commands/cli_info.py
+++ b/src/mailman/commands/cli_info.py
@@ -20,12 +20,12 @@
 import sys
 
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from mailman.core.api import API30, API31
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
 from mailman.version import MAILMAN_VERSION_FULL
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/cli_inject.py b/src/mailman/commands/cli_inject.py
index acbc37d67..0255b71d2 100644
--- a/src/mailman/commands/cli_inject.py
+++ b/src/mailman/commands/cli_inject.py
@@ -19,12 +19,12 @@
 
 import sys
 
-from mailman import public
 from mailman.app.inject import inject_text
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
 from mailman.interfaces.listmanager import IListManager
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/commands/cli_lists.py b/src/mailman/commands/cli_lists.py
index f5e6d724a..3a598ab05 100644
--- a/src/mailman/commands/cli_lists.py
+++ b/src/mailman/commands/cli_lists.py
@@ -17,7 +17,6 @@
 
 """The 'lists' subcommand."""
 
-from mailman import public
 from mailman.app.lifecycle import create_list, remove_list
 from mailman.core.constants import system_preferences
 from mailman.core.i18n import _
@@ -32,6 +31,7 @@ from mailman.interfaces.languages import ILanguageManager
 from mailman.interfaces.listmanager import IListManager, ListAlreadyExistsError
 from mailman.interfaces.template import ITemplateLoader
 from mailman.utilities.string import expand, wrap
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/commands/cli_members.py b/src/mailman/commands/cli_members.py
index 476d1f77d..1eb6550d6 100644
--- a/src/mailman/commands/cli_members.py
+++ b/src/mailman/commands/cli_members.py
@@ -21,7 +21,6 @@ import sys
 
 from contextlib import ExitStack
 from email.utils import formataddr, parseaddr
-from mailman import public
 from mailman.app.membership import add_member
 from mailman.core.i18n import _
 from mailman.database.transaction import transactional
@@ -31,6 +30,7 @@ from mailman.interfaces.member import (
     AlreadySubscribedError, DeliveryMode, DeliveryStatus, MemberRole)
 from mailman.interfaces.subscriptions import RequestRecord
 from operator import attrgetter
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/commands/cli_qfile.py b/src/mailman/commands/cli_qfile.py
index f6502f14a..c8d3ec84b 100644
--- a/src/mailman/commands/cli_qfile.py
+++ b/src/mailman/commands/cli_qfile.py
@@ -19,11 +19,11 @@
 
 import pickle
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
 from mailman.utilities.interact import interact
 from pprint import PrettyPrinter
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/cli_status.py b/src/mailman/commands/cli_status.py
index 6b4abe45e..b60ba8841 100644
--- a/src/mailman/commands/cli_status.py
+++ b/src/mailman/commands/cli_status.py
@@ -19,10 +19,10 @@
 
 import socket
 
-from mailman import public
 from mailman.bin.master import WatcherState, master_state
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/cli_unshunt.py b/src/mailman/commands/cli_unshunt.py
index 6bb1a9800..49b9c6e26 100644
--- a/src/mailman/commands/cli_unshunt.py
+++ b/src/mailman/commands/cli_unshunt.py
@@ -19,10 +19,10 @@
 
 import sys
 
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/cli_version.py b/src/mailman/commands/cli_version.py
index 4660087de..bc26d0115 100644
--- a/src/mailman/commands/cli_version.py
+++ b/src/mailman/commands/cli_version.py
@@ -17,9 +17,9 @@
 
 """The Mailman version."""
 
-from mailman import public
 from mailman.interfaces.command import ICLISubCommand
 from mailman.version import MAILMAN_VERSION_FULL
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/cli_withlist.py b/src/mailman/commands/cli_withlist.py
index 23250c1a5..42eb57cfc 100644
--- a/src/mailman/commands/cli_withlist.py
+++ b/src/mailman/commands/cli_withlist.py
@@ -23,13 +23,13 @@ import sys
 from contextlib import ExitStack, suppress
 from functools import partial
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.command import ICLISubCommand
 from mailman.interfaces.listmanager import IListManager
 from mailman.utilities.interact import DEFAULT_BANNER, interact
 from mailman.utilities.modules import call_name
+from public import public
 from string import Template
 from traceback import print_exc
 from zope.component import getUtility
diff --git a/src/mailman/commands/eml_confirm.py b/src/mailman/commands/eml_confirm.py
index 6787b0987..425bb00e8 100644
--- a/src/mailman/commands/eml_confirm.py
+++ b/src/mailman/commands/eml_confirm.py
@@ -17,10 +17,10 @@
 
 """The 'confirm' email command."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.command import ContinueProcessing, IEmailCommand
 from mailman.interfaces.subscriptions import ISubscriptionManager, TokenOwner
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/eml_echo.py b/src/mailman/commands/eml_echo.py
index 67f917d3e..db340fda9 100644
--- a/src/mailman/commands/eml_echo.py
+++ b/src/mailman/commands/eml_echo.py
@@ -17,9 +17,9 @@
 
 """The email command 'echo'."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.command import ContinueProcessing, IEmailCommand
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/eml_end.py b/src/mailman/commands/eml_end.py
index 82b66a1a6..c280cc52f 100644
--- a/src/mailman/commands/eml_end.py
+++ b/src/mailman/commands/eml_end.py
@@ -17,9 +17,9 @@
 
 """The email commands 'end' and 'stop'."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.command import ContinueProcessing, IEmailCommand
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/eml_help.py b/src/mailman/commands/eml_help.py
index 4ca2d72a4..b4a39009a 100644
--- a/src/mailman/commands/eml_help.py
+++ b/src/mailman/commands/eml_help.py
@@ -17,11 +17,11 @@
 
 """The email command 'help'."""
 
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.command import ContinueProcessing, IEmailCommand
 from mailman.utilities.string import wrap
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/commands/eml_membership.py b/src/mailman/commands/eml_membership.py
index e658e7b58..22f26e24d 100644
--- a/src/mailman/commands/eml_membership.py
+++ b/src/mailman/commands/eml_membership.py
@@ -18,13 +18,13 @@
 """The email commands 'join' and 'subscribe'."""
 
 from email.utils import formataddr, parseaddr
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.command import ContinueProcessing, IEmailCommand
 from mailman.interfaces.member import DeliveryMode, MemberRole
 from mailman.interfaces.subscriptions import (
     ISubscriptionManager, ISubscriptionService)
 from mailman.interfaces.usermanager import IUserManager
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/config/__init__.py b/src/mailman/config/__init__.py
index 5c45d6599..66b298217 100644
--- a/src/mailman/config/__init__.py
+++ b/src/mailman/config/__init__.py
@@ -17,8 +17,8 @@
 
 """Mailman configuration package."""
 
-from mailman import public
 from mailman.config.config import Configuration
+from public import public
 
 
 public(config=Configuration())
diff --git a/src/mailman/config/config.py b/src/mailman/config/config.py
index 5454c5e5a..a274aa3b9 100644
--- a/src/mailman/config/config.py
+++ b/src/mailman/config/config.py
@@ -24,13 +24,14 @@ import mailman.templates
 from configparser import ConfigParser
 from flufl.lock import Lock
 from lazr.config import ConfigSchema, as_boolean
-from mailman import public, version
+from mailman import version
 from mailman.interfaces.configuration import (
     ConfigurationUpdatedEvent, IConfiguration, MissingConfigurationFileError)
 from mailman.interfaces.languages import ILanguageManager
 from mailman.utilities.filesystem import makedirs
 from mailman.utilities.modules import call_name, expand_path
 from pkg_resources import resource_filename, resource_string as resource_bytes
+from public import public
 from string import Template
 from zope.component import getUtility
 from zope.event import notify
diff --git a/src/mailman/core/api.py b/src/mailman/core/api.py
index e6e013af0..c9e377bbf 100644
--- a/src/mailman/core/api.py
+++ b/src/mailman/core/api.py
@@ -18,9 +18,9 @@
 """REST web service API contexts."""
 
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.api import IAPI
+from public import public
 from uuid import UUID
 from zope.interface import implementer
 
diff --git a/src/mailman/core/chains.py b/src/mailman/core/chains.py
index ec84db2c4..0af61fd2a 100644
--- a/src/mailman/core/chains.py
+++ b/src/mailman/core/chains.py
@@ -17,11 +17,11 @@
 
 """Application support for chain processing."""
 
-from mailman import public
 from mailman.chains.base import Chain, TerminalChainBase
 from mailman.config import config
 from mailman.interfaces.chain import IChain, LinkAction
 from mailman.utilities.modules import find_components
+from public import public
 from zope.interface.verify import verifyObject
 
 
diff --git a/src/mailman/core/constants.py b/src/mailman/core/constants.py
index f82783e9f..e5d265256 100644
--- a/src/mailman/core/constants.py
+++ b/src/mailman/core/constants.py
@@ -17,11 +17,11 @@
 
 """Various constants and enumerations."""
 
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.languages import ILanguageManager
 from mailman.interfaces.member import DeliveryMode, DeliveryStatus
 from mailman.interfaces.preferences import IPreferences
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/core/i18n.py b/src/mailman/core/i18n.py
index 5536fcdaf..345020a13 100644
--- a/src/mailman/core/i18n.py
+++ b/src/mailman/core/i18n.py
@@ -20,8 +20,8 @@
 import mailman.messages
 
 from flufl.i18n import PackageStrategy, registry
-from mailman import public
 from mailman.interfaces.configuration import ConfigurationUpdatedEvent
+from public import public
 
 
 public(_=None)
diff --git a/src/mailman/core/initialize.py b/src/mailman/core/initialize.py
index 7b39465c5..6bd1d6777 100644
--- a/src/mailman/core/initialize.py
+++ b/src/mailman/core/initialize.py
@@ -29,10 +29,10 @@ import sys
 import mailman.config.config
 import mailman.core.logging
 
-from mailman import public
 from mailman.interfaces.database import IDatabaseFactory
 from mailman.utilities.modules import call_name
 from pkg_resources import resource_string as resource_bytes
+from public import public
 from zope.component import getUtility
 from zope.configuration import xmlconfig
 
diff --git a/src/mailman/core/logging.py b/src/mailman/core/logging.py
index a7e8b2554..53bb2cf1c 100644
--- a/src/mailman/core/logging.py
+++ b/src/mailman/core/logging.py
@@ -23,8 +23,8 @@ import codecs
 import logging
 
 from lazr.config import as_boolean, as_log_level
-from mailman import public
 from mailman.config import config
+from public import public
 
 
 _handlers = {}
diff --git a/src/mailman/core/pipelines.py b/src/mailman/core/pipelines.py
index 5df21ed15..fb663cee9 100644
--- a/src/mailman/core/pipelines.py
+++ b/src/mailman/core/pipelines.py
@@ -19,7 +19,6 @@
 
 import logging
 
-from mailman import public
 from mailman.app.bounces import bounce_message
 from mailman.config import config
 from mailman.core.i18n import _
@@ -27,6 +26,7 @@ from mailman.interfaces.handler import IHandler
 from mailman.interfaces.pipeline import (
     DiscardMessage, IPipeline, RejectMessage)
 from mailman.utilities.modules import find_components
+from public import public
 from zope.interface import implementer
 from zope.interface.verify import verifyObject
 
diff --git a/src/mailman/core/rules.py b/src/mailman/core/rules.py
index f6ca87726..680d4f007 100644
--- a/src/mailman/core/rules.py
+++ b/src/mailman/core/rules.py
@@ -17,10 +17,10 @@
 
 """Various rule helpers"""
 
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.rules import IRule
 from mailman.utilities.modules import find_components
+from public import public
 from zope.interface.verify import verifyObject
 
 
diff --git a/src/mailman/core/runner.py b/src/mailman/core/runner.py
index d0ff6f5ce..ed1c26d38 100644
--- a/src/mailman/core/runner.py
+++ b/src/mailman/core/runner.py
@@ -25,7 +25,6 @@ import traceback
 from contextlib import suppress
 from io import StringIO
 from lazr.config import as_boolean, as_timedelta
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.core.logging import reopen
@@ -34,6 +33,7 @@ from mailman.interfaces.languages import ILanguageManager
 from mailman.interfaces.listmanager import IListManager
 from mailman.interfaces.runner import IRunner, RunnerCrashEvent
 from mailman.utilities.string import expand
+from public import public
 from zope.component import getUtility
 from zope.event import notify
 from zope.interface import implementer
diff --git a/src/mailman/core/switchboard.py b/src/mailman/core/switchboard.py
index cfbb371ba..f03ee11e5 100644
--- a/src/mailman/core/switchboard.py
+++ b/src/mailman/core/switchboard.py
@@ -31,13 +31,13 @@ import pickle
 import hashlib
 import logging
 
-from mailman import public
 from mailman.config import config
 from mailman.email.message import Message
 from mailman.interfaces.configuration import ConfigurationUpdatedEvent
 from mailman.interfaces.switchboard import ISwitchboard
 from mailman.utilities.filesystem import makedirs
 from mailman.utilities.string import expand
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/core/system.py b/src/mailman/core/system.py
index ee88c5adf..41ddced95 100644
--- a/src/mailman/core/system.py
+++ b/src/mailman/core/system.py
@@ -19,8 +19,9 @@
 
 import sys
 
-from mailman import public, version
+from mailman import version
 from mailman.interfaces.system import ISystem
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/database/alembic/__init__.py b/src/mailman/database/alembic/__init__.py
index af2596f04..ff74113d7 100644
--- a/src/mailman/database/alembic/__init__.py
+++ b/src/mailman/database/alembic/__init__.py
@@ -18,8 +18,8 @@
 """Alembic configuration initization."""
 
 from alembic.config import Config
-from mailman import public
 from mailman.utilities.modules import expand_path
+from public import public
 
 
 public(alembic_cfg=Config(expand_path('python:mailman.config.alembic')))
diff --git a/src/mailman/database/alembic/env.py b/src/mailman/database/alembic/env.py
index c7a5e151d..e359b201d 100644
--- a/src/mailman/database/alembic/env.py
+++ b/src/mailman/database/alembic/env.py
@@ -19,11 +19,11 @@
 
 from alembic import context
 from contextlib import closing
-from mailman import public
 from mailman.config import config
 from mailman.core.initialize import initialize_1
 from mailman.database.model import Model
 from mailman.utilities.string import expand
+from public import public
 from sqlalchemy import create_engine
 
 
diff --git a/src/mailman/database/base.py b/src/mailman/database/base.py
index f57228029..586e1b20d 100644
--- a/src/mailman/database/base.py
+++ b/src/mailman/database/base.py
@@ -19,10 +19,10 @@
 
 import logging
 
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.database import IDatabase
 from mailman.utilities.string import expand
+from public import public
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
 from zope.interface import implementer
diff --git a/src/mailman/database/factory.py b/src/mailman/database/factory.py
index ff7fa59a9..4d003c39c 100644
--- a/src/mailman/database/factory.py
+++ b/src/mailman/database/factory.py
@@ -24,13 +24,13 @@ import alembic.command
 from alembic.migration import MigrationContext
 from alembic.script import ScriptDirectory
 from flufl.lock import Lock
-from mailman import public
 from mailman.config import config
 from mailman.database.alembic import alembic_cfg
 from mailman.database.model import Model
 from mailman.interfaces.database import (
     DatabaseError, IDatabase, IDatabaseFactory)
 from mailman.utilities.modules import call_name
+from public import public
 from sqlalchemy import MetaData
 from zope.interface import implementer
 from zope.interface.verify import verifyObject
diff --git a/src/mailman/database/helpers.py b/src/mailman/database/helpers.py
index b1dc381df..27c870058 100644
--- a/src/mailman/database/helpers.py
+++ b/src/mailman/database/helpers.py
@@ -19,7 +19,7 @@
 
 import sqlalchemy as sa
 
-from mailman import public
+from public import public
 
 
 @public
diff --git a/src/mailman/database/model.py b/src/mailman/database/model.py
index c2ee90491..098f62d4b 100644
--- a/src/mailman/database/model.py
+++ b/src/mailman/database/model.py
@@ -18,8 +18,8 @@
 """Base class for all database classes."""
 
 from contextlib import closing
-from mailman import public
 from mailman.config import config
+from public import public
 from sqlalchemy.ext.declarative import declarative_base
 
 
diff --git a/src/mailman/database/mysql.py b/src/mailman/database/mysql.py
index 0c0de54a9..cff16e208 100644
--- a/src/mailman/database/mysql.py
+++ b/src/mailman/database/mysql.py
@@ -17,9 +17,9 @@
 
 """MySQL database support"""
 
-from mailman import public
 from mailman.database.base import SABaseDatabase
 from mailman.database.model import Model
+from public import public
 
 
 @public
diff --git a/src/mailman/database/postgresql.py b/src/mailman/database/postgresql.py
index b1095e45f..d0c208a50 100644
--- a/src/mailman/database/postgresql.py
+++ b/src/mailman/database/postgresql.py
@@ -17,9 +17,9 @@
 
 """PostgreSQL database support."""
 
-from mailman import public
 from mailman.database.base import SABaseDatabase
 from mailman.database.model import Model
+from public import public
 from sqlalchemy import Integer
 
 
diff --git a/src/mailman/database/sqlite.py b/src/mailman/database/sqlite.py
index 08700bfb2..3659efaff 100644
--- a/src/mailman/database/sqlite.py
+++ b/src/mailman/database/sqlite.py
@@ -19,8 +19,8 @@
 
 import os
 
-from mailman import public
 from mailman.database.base import SABaseDatabase
+from public import public
 from urllib.parse import urlparse
 
 
diff --git a/src/mailman/database/transaction.py b/src/mailman/database/transaction.py
index 09dfda8e3..1b5368a39 100644
--- a/src/mailman/database/transaction.py
+++ b/src/mailman/database/transaction.py
@@ -18,8 +18,8 @@
 """Transactional support."""
 
 from contextlib import contextmanager
-from mailman import public
 from mailman.config import config
+from public import public
 
 
 @public
diff --git a/src/mailman/database/types.py b/src/mailman/database/types.py
index bbd040d96..10b826e7c 100644
--- a/src/mailman/database/types.py
+++ b/src/mailman/database/types.py
@@ -19,7 +19,7 @@
 
 import uuid
 
-from mailman import public
+from public import public
 from sqlalchemy import Integer
 from sqlalchemy.dialects import postgresql
 from sqlalchemy.ext.compiler import compiles
diff --git a/src/mailman/docs/__init__.py b/src/mailman/docs/__init__.py
index 68c7bb4cf..939c1e6e6 100644
--- a/src/mailman/docs/__init__.py
+++ b/src/mailman/docs/__init__.py
@@ -17,8 +17,8 @@
 
 """General Mailman doc tests."""
 
-from mailman import public
 from mailman.testing.layers import ConfigLayer
+from public import public
 
 
 public(layer=ConfigLayer)
diff --git a/src/mailman/email/message.py b/src/mailman/email/message.py
index 26bc35b78..da2ce837f 100644
--- a/src/mailman/email/message.py
+++ b/src/mailman/email/message.py
@@ -29,9 +29,9 @@ import email.utils
 
 from email.header import Header
 from email.mime.multipart import MIMEMultipart
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.member import DeliveryStatus
+from public import public
 
 
 COMMASPACE = ', '
diff --git a/src/mailman/email/validate.py b/src/mailman/email/validate.py
index 99371d9e5..be8ba775a 100644
--- a/src/mailman/email/validate.py
+++ b/src/mailman/email/validate.py
@@ -19,10 +19,10 @@
 
 import re
 
-from mailman import public
 from mailman.interfaces.address import (
     IEmailValidator, InvalidEmailAddressError)
 from mailman.utilities.email import split_email
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/acknowledge.py b/src/mailman/handlers/acknowledge.py
index c7035de67..56608a3e9 100644
--- a/src/mailman/handlers/acknowledge.py
+++ b/src/mailman/handlers/acknowledge.py
@@ -20,13 +20,13 @@
 This only happens if the sender has set their AcknowledgePosts attribute.
 """
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.email.message import UserNotification
 from mailman.interfaces.handler import IHandler
 from mailman.interfaces.languages import ILanguageManager
 from mailman.interfaces.template import ITemplateLoader
 from mailman.utilities.string import expand, oneline
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/handlers/after_delivery.py b/src/mailman/handlers/after_delivery.py
index efe38ec63..928f90f76 100644
--- a/src/mailman/handlers/after_delivery.py
+++ b/src/mailman/handlers/after_delivery.py
@@ -17,10 +17,10 @@
 
 """Perform some bookkeeping after a successful post."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
 from mailman.utilities.datetime import now
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/avoid_duplicates.py b/src/mailman/handlers/avoid_duplicates.py
index 59cb568de..7fe2136da 100644
--- a/src/mailman/handlers/avoid_duplicates.py
+++ b/src/mailman/handlers/avoid_duplicates.py
@@ -24,9 +24,9 @@ warning header, or pass it through, depending on the user's preferences.
 """
 
 from email.utils import getaddresses, formataddr
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/cleanse.py b/src/mailman/handlers/cleanse.py
index 56add9ef7..8704491f6 100644
--- a/src/mailman/handlers/cleanse.py
+++ b/src/mailman/handlers/cleanse.py
@@ -20,10 +20,10 @@
 import logging
 
 from email.utils import formataddr
-from mailman import public
 from mailman.core.i18n import _
 from mailman.handlers.cook_headers import uheader
 from mailman.interfaces.handler import IHandler
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/cleanse_dkim.py b/src/mailman/handlers/cleanse_dkim.py
index 72a9c5e81..cc04858be 100644
--- a/src/mailman/handlers/cleanse_dkim.py
+++ b/src/mailman/handlers/cleanse_dkim.py
@@ -26,10 +26,10 @@ originating at the Mailman server for the outgoing message.
 """
 
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/cook_headers.py b/src/mailman/handlers/cook_headers.py
index 5f203fcbd..672738bf9 100644
--- a/src/mailman/handlers/cook_headers.py
+++ b/src/mailman/handlers/cook_headers.py
@@ -22,11 +22,11 @@ import logging
 
 from email.header import Header
 from email.utils import formataddr, getaddresses, parseaddr
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
 from mailman.interfaces.mailinglist import Personalization, ReplyToMunging
 from mailman.version import VERSION
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/decorate.py b/src/mailman/handlers/decorate.py
index 7f5519fd0..6a16dfc76 100644
--- a/src/mailman/handlers/decorate.py
+++ b/src/mailman/handlers/decorate.py
@@ -22,13 +22,13 @@ import logging
 
 from email.mime.text import MIMEText
 from email.utils import formataddr
-from mailman import public
 from mailman.core.i18n import _
 from mailman.email.message import Message
 from mailman.interfaces.handler import IHandler
 from mailman.interfaces.mailinglist import IListArchiverSet
 from mailman.interfaces.template import ITemplateLoader
 from mailman.utilities.string import expand
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/handlers/file_recipients.py b/src/mailman/handlers/file_recipients.py
index 95160706a..e283d936e 100644
--- a/src/mailman/handlers/file_recipients.py
+++ b/src/mailman/handlers/file_recipients.py
@@ -20,9 +20,9 @@
 import os
 import errno
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/member_recipients.py b/src/mailman/handlers/member_recipients.py
index ffcecfb18..309603ef0 100644
--- a/src/mailman/handlers/member_recipients.py
+++ b/src/mailman/handlers/member_recipients.py
@@ -23,13 +23,13 @@ on the `recipients' attribute of the message.  This attribute is used by the
 SendmailDeliver and BulkDeliver modules.
 """
 
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
 from mailman.interfaces.member import DeliveryStatus
 from mailman.interfaces.pipeline import RejectMessage
 from mailman.utilities.string import wrap
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/mime_delete.py b/src/mailman/handlers/mime_delete.py
index b88c40b0c..ac56e5dd6 100644
--- a/src/mailman/handlers/mime_delete.py
+++ b/src/mailman/handlers/mime_delete.py
@@ -36,7 +36,6 @@ from email.mime.message import MIMEMessage
 from email.mime.text import MIMEText
 from itertools import count
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.email.message import OwnerNotification
@@ -45,6 +44,7 @@ from mailman.interfaces.handler import IHandler
 from mailman.interfaces.pipeline import DiscardMessage, RejectMessage
 from mailman.utilities.string import oneline
 from mailman.version import VERSION
+from public import public
 from string import Template
 from zope.interface import implementer
 
diff --git a/src/mailman/handlers/owner_recipients.py b/src/mailman/handlers/owner_recipients.py
index 9ef2568f5..4a4ee9a24 100644
--- a/src/mailman/handlers/owner_recipients.py
+++ b/src/mailman/handlers/owner_recipients.py
@@ -17,11 +17,11 @@
 
 """Calculate the list owner recipients (includes moderators)."""
 
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
 from mailman.interfaces.member import DeliveryStatus
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/replybot.py b/src/mailman/handlers/replybot.py
index a86ccbbf3..e8b9e4fc6 100644
--- a/src/mailman/handlers/replybot.py
+++ b/src/mailman/handlers/replybot.py
@@ -19,7 +19,6 @@
 
 import logging
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.email.message import UserNotification
 from mailman.interfaces.autorespond import (
@@ -28,6 +27,7 @@ from mailman.interfaces.handler import IHandler
 from mailman.interfaces.usermanager import IUserManager
 from mailman.utilities.datetime import today
 from mailman.utilities.string import expand, wrap
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/handlers/rfc_2369.py b/src/mailman/handlers/rfc_2369.py
index e042bc5e3..7f36dd057 100644
--- a/src/mailman/handlers/rfc_2369.py
+++ b/src/mailman/handlers/rfc_2369.py
@@ -20,12 +20,12 @@
 import logging
 
 from email.utils import formataddr
-from mailman import public
 from mailman.core.i18n import _
 from mailman.handlers.cook_headers import uheader
 from mailman.interfaces.archiver import ArchivePolicy
 from mailman.interfaces.handler import IHandler
 from mailman.interfaces.mailinglist import IListArchiverSet
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/subject_prefix.py b/src/mailman/handlers/subject_prefix.py
index 20f47fc5d..7bb1a3e5d 100644
--- a/src/mailman/handlers/subject_prefix.py
+++ b/src/mailman/handlers/subject_prefix.py
@@ -21,9 +21,9 @@ import re
 
 from contextlib import suppress
 from email.header import Header, decode_header, make_header
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/tagger.py b/src/mailman/handlers/tagger.py
index fb0a24ba5..f7c637085 100644
--- a/src/mailman/handlers/tagger.py
+++ b/src/mailman/handlers/tagger.py
@@ -21,9 +21,9 @@ import re
 import email.iterators
 import email.parser
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/to_archive.py b/src/mailman/handlers/to_archive.py
index d5b980ab4..d2805ea3e 100644
--- a/src/mailman/handlers/to_archive.py
+++ b/src/mailman/handlers/to_archive.py
@@ -17,11 +17,11 @@
 
 """Add the message to the archives."""
 
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.archiver import ArchivePolicy
 from mailman.interfaces.handler import IHandler
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/to_digest.py b/src/mailman/handlers/to_digest.py
index 671a2197c..2de911f46 100644
--- a/src/mailman/handlers/to_digest.py
+++ b/src/mailman/handlers/to_digest.py
@@ -19,11 +19,11 @@
 
 import os
 
-from mailman import public
 from mailman.app.digests import maybe_send_digest_now
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
 from mailman.utilities.mailbox import Mailbox
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/to_outgoing.py b/src/mailman/handlers/to_outgoing.py
index b9fae912c..4726973f2 100644
--- a/src/mailman/handlers/to_outgoing.py
+++ b/src/mailman/handlers/to_outgoing.py
@@ -22,10 +22,10 @@ posted to the list membership.  Anything else that needs to go out to some
 recipient should just be placed in the out queue directly.
 """
 
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/handlers/to_usenet.py b/src/mailman/handlers/to_usenet.py
index 4bfa00c5f..f5e01ef6e 100644
--- a/src/mailman/handlers/to_usenet.py
+++ b/src/mailman/handlers/to_usenet.py
@@ -19,10 +19,10 @@
 
 import logging
 
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.handler import IHandler
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/interfaces/action.py b/src/mailman/interfaces/action.py
index dcff41cbd..08dc9c5ca 100644
--- a/src/mailman/interfaces/action.py
+++ b/src/mailman/interfaces/action.py
@@ -18,7 +18,7 @@
 """Message actions."""
 
 from enum import Enum
-from mailman import public
+from public import public
 
 
 @public
diff --git a/src/mailman/interfaces/address.py b/src/mailman/interfaces/address.py
index 8a1ac81d5..d460e96ca 100644
--- a/src/mailman/interfaces/address.py
+++ b/src/mailman/interfaces/address.py
@@ -17,8 +17,8 @@
 
 """Interface for email address related information."""
 
-from mailman import public
 from mailman.interfaces.errors import MailmanError
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/api.py b/src/mailman/interfaces/api.py
index 3ba158b35..e2c6645db 100644
--- a/src/mailman/interfaces/api.py
+++ b/src/mailman/interfaces/api.py
@@ -17,7 +17,7 @@
 
 """REST web service API context."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/archiver.py b/src/mailman/interfaces/archiver.py
index cd10b22e3..eb9227dd8 100644
--- a/src/mailman/interfaces/archiver.py
+++ b/src/mailman/interfaces/archiver.py
@@ -18,7 +18,7 @@
 """Interface for archiving schemes."""
 
 from enum import Enum
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/autorespond.py b/src/mailman/interfaces/autorespond.py
index 645a6c76b..b9f3f0e3a 100644
--- a/src/mailman/interfaces/autorespond.py
+++ b/src/mailman/interfaces/autorespond.py
@@ -19,7 +19,7 @@
 
 from datetime import timedelta
 from enum import Enum
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/bans.py b/src/mailman/interfaces/bans.py
index 055ad69a3..59928ff8e 100644
--- a/src/mailman/interfaces/bans.py
+++ b/src/mailman/interfaces/bans.py
@@ -17,7 +17,7 @@
 
 """Manager of email address bans."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/bounce.py b/src/mailman/interfaces/bounce.py
index 0e39ca3b9..368657c47 100644
--- a/src/mailman/interfaces/bounce.py
+++ b/src/mailman/interfaces/bounce.py
@@ -18,7 +18,7 @@
 """Interface to bounce detection components."""
 
 from enum import Enum
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/cache.py b/src/mailman/interfaces/cache.py
index 74fb2084a..39d3e7c73 100644
--- a/src/mailman/interfaces/cache.py
+++ b/src/mailman/interfaces/cache.py
@@ -17,7 +17,7 @@
 
 """File caches."""
 
-from mailman import public
+from public import public
 from zope.interface import Interface
 
 
diff --git a/src/mailman/interfaces/chain.py b/src/mailman/interfaces/chain.py
index 0af9bf8e5..146abafd7 100644
--- a/src/mailman/interfaces/chain.py
+++ b/src/mailman/interfaces/chain.py
@@ -18,7 +18,7 @@
 """Interfaces describing the basics of chains and links."""
 
 from enum import Enum
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/command.py b/src/mailman/interfaces/command.py
index 95719b504..be3fd5bb2 100644
--- a/src/mailman/interfaces/command.py
+++ b/src/mailman/interfaces/command.py
@@ -18,7 +18,7 @@
 """Interfaces defining email commands."""
 
 from enum import Enum
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/configuration.py b/src/mailman/interfaces/configuration.py
index 2e38e614c..b4f9d696c 100644
--- a/src/mailman/interfaces/configuration.py
+++ b/src/mailman/interfaces/configuration.py
@@ -17,8 +17,8 @@
 
 """Configuration system interface."""
 
-from mailman import public
 from mailman.interfaces.errors import MailmanError
+from public import public
 from zope.interface import Interface
 
 
diff --git a/src/mailman/interfaces/database.py b/src/mailman/interfaces/database.py
index 1f658c556..052c7d4bb 100644
--- a/src/mailman/interfaces/database.py
+++ b/src/mailman/interfaces/database.py
@@ -17,8 +17,8 @@
 
 """Interfaces for database interaction."""
 
-from mailman import public
 from mailman.interfaces.errors import MailmanError
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/digests.py b/src/mailman/interfaces/digests.py
index cff838284..fd38b374a 100644
--- a/src/mailman/interfaces/digests.py
+++ b/src/mailman/interfaces/digests.py
@@ -18,7 +18,7 @@
 """One last digest."""
 
 from enum import Enum
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/domain.py b/src/mailman/interfaces/domain.py
index b1940f400..6318e9551 100644
--- a/src/mailman/interfaces/domain.py
+++ b/src/mailman/interfaces/domain.py
@@ -17,8 +17,8 @@
 
 """Interface representing domains."""
 
-from mailman import public
 from mailman.interfaces.errors import MailmanError
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/errors.py b/src/mailman/interfaces/errors.py
index dbf74c035..b21d07418 100644
--- a/src/mailman/interfaces/errors.py
+++ b/src/mailman/interfaces/errors.py
@@ -22,7 +22,7 @@ components.  More specific exceptions will be located in the relevant
 interfaces.
 """
 
-from mailman import public
+from public import public
 
 
 @public
diff --git a/src/mailman/interfaces/handler.py b/src/mailman/interfaces/handler.py
index f6b2aea66..29061c369 100644
--- a/src/mailman/interfaces/handler.py
+++ b/src/mailman/interfaces/handler.py
@@ -17,7 +17,7 @@
 
 """Interface describing a pipeline handler."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/languages.py b/src/mailman/interfaces/languages.py
index b45083575..18f928be9 100644
--- a/src/mailman/interfaces/languages.py
+++ b/src/mailman/interfaces/languages.py
@@ -17,7 +17,7 @@
 
 """Interfaces for managing languages."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/listmanager.py b/src/mailman/interfaces/listmanager.py
index 2c7208496..dde23ab1f 100644
--- a/src/mailman/interfaces/listmanager.py
+++ b/src/mailman/interfaces/listmanager.py
@@ -17,8 +17,8 @@
 
 """Interface for list storage, deleting, and finding."""
 
-from mailman import public
 from mailman.interfaces.errors import MailmanError
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/mailinglist.py b/src/mailman/interfaces/mailinglist.py
index 877016f41..359cd5069 100644
--- a/src/mailman/interfaces/mailinglist.py
+++ b/src/mailman/interfaces/mailinglist.py
@@ -18,8 +18,8 @@
 """Interface for a mailing list."""
 
 from enum import Enum
-from mailman import public
 from mailman.interfaces.member import MemberRole
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/member.py b/src/mailman/interfaces/member.py
index 094652521..a2a9c7cbd 100644
--- a/src/mailman/interfaces/member.py
+++ b/src/mailman/interfaces/member.py
@@ -18,8 +18,8 @@
 """Interface describing the basics of a member."""
 
 from enum import Enum
-from mailman import public
 from mailman.interfaces.errors import MailmanError
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/messages.py b/src/mailman/interfaces/messages.py
index 2ea2aa312..29f92fdc7 100644
--- a/src/mailman/interfaces/messages.py
+++ b/src/mailman/interfaces/messages.py
@@ -17,7 +17,7 @@
 
 """The message storage service."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/mime.py b/src/mailman/interfaces/mime.py
index c1a6e050f..94a98b58e 100644
--- a/src/mailman/interfaces/mime.py
+++ b/src/mailman/interfaces/mime.py
@@ -18,7 +18,7 @@
 """MIME content filtering."""
 
 from enum import Enum
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/mlistrequest.py b/src/mailman/interfaces/mlistrequest.py
index 45712ed86..ca83f77c1 100644
--- a/src/mailman/interfaces/mlistrequest.py
+++ b/src/mailman/interfaces/mlistrequest.py
@@ -17,7 +17,7 @@
 
 """Interface for a web request accessing a mailing list."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/mta.py b/src/mailman/interfaces/mta.py
index 47436ead5..2917c0f79 100644
--- a/src/mailman/interfaces/mta.py
+++ b/src/mailman/interfaces/mta.py
@@ -17,8 +17,8 @@
 
 """Interface for mail transport agent integration."""
 
-from mailman import public
 from mailman.interfaces.errors import MailmanError
+from public import public
 from zope.interface import Interface
 
 
diff --git a/src/mailman/interfaces/nntp.py b/src/mailman/interfaces/nntp.py
index 72a74fe90..2bb9c45b1 100644
--- a/src/mailman/interfaces/nntp.py
+++ b/src/mailman/interfaces/nntp.py
@@ -18,7 +18,7 @@
 """NNTP and newsgroup interfaces."""
 
 from enum import Enum
-from mailman import public
+from public import public
 
 
 @public
diff --git a/src/mailman/interfaces/pending.py b/src/mailman/interfaces/pending.py
index cf92fed9e..c630e2133 100644
--- a/src/mailman/interfaces/pending.py
+++ b/src/mailman/interfaces/pending.py
@@ -22,7 +22,7 @@ maps these events to a unique hash that can be used as a token for end user
 confirmation.
 """
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/pipeline.py b/src/mailman/interfaces/pipeline.py
index cdef6a768..a41e9b6f7 100644
--- a/src/mailman/interfaces/pipeline.py
+++ b/src/mailman/interfaces/pipeline.py
@@ -17,7 +17,7 @@
 
 """Interface for describing pipelines."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/preferences.py b/src/mailman/interfaces/preferences.py
index 024fdea3c..0d830bdd7 100644
--- a/src/mailman/interfaces/preferences.py
+++ b/src/mailman/interfaces/preferences.py
@@ -17,7 +17,7 @@
 
 """Interface for preferences."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/requests.py b/src/mailman/interfaces/requests.py
index 3098772a9..8b316e79f 100644
--- a/src/mailman/interfaces/requests.py
+++ b/src/mailman/interfaces/requests.py
@@ -22,7 +22,7 @@ moderators, such as subscription requests and held messages.
 """
 
 from enum import Enum
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/roster.py b/src/mailman/interfaces/roster.py
index 2993e4fc4..bf8489e33 100644
--- a/src/mailman/interfaces/roster.py
+++ b/src/mailman/interfaces/roster.py
@@ -17,7 +17,7 @@
 
 """Interface for a roster of members."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/rules.py b/src/mailman/interfaces/rules.py
index 9f5f1365e..cca8cf565 100644
--- a/src/mailman/interfaces/rules.py
+++ b/src/mailman/interfaces/rules.py
@@ -17,7 +17,7 @@
 
 """Interface describing the basics of rules."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/runner.py b/src/mailman/interfaces/runner.py
index e39efb097..06caf0e95 100644
--- a/src/mailman/interfaces/runner.py
+++ b/src/mailman/interfaces/runner.py
@@ -17,7 +17,7 @@
 
 """Interface for runners."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/styles.py b/src/mailman/interfaces/styles.py
index a183933f7..e4b5288c1 100644
--- a/src/mailman/interfaces/styles.py
+++ b/src/mailman/interfaces/styles.py
@@ -17,8 +17,8 @@
 
 """Interfaces for list styles."""
 
-from mailman import public
 from mailman.interfaces.errors import MailmanError
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/subscriptions.py b/src/mailman/interfaces/subscriptions.py
index 284261de5..dc3563def 100644
--- a/src/mailman/interfaces/subscriptions.py
+++ b/src/mailman/interfaces/subscriptions.py
@@ -19,9 +19,9 @@
 
 from collections import namedtuple
 from enum import Enum
-from mailman import public
 from mailman.interfaces.errors import MailmanError
 from mailman.interfaces.member import DeliveryMode, MembershipError
+from public import public
 from zope.interface import Interface
 
 
diff --git a/src/mailman/interfaces/switchboard.py b/src/mailman/interfaces/switchboard.py
index 4428f4b12..d9e2f9aab 100644
--- a/src/mailman/interfaces/switchboard.py
+++ b/src/mailman/interfaces/switchboard.py
@@ -17,7 +17,7 @@
 
 """Interface for switchboards."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/system.py b/src/mailman/interfaces/system.py
index 1b0a9a2de..440611537 100644
--- a/src/mailman/interfaces/system.py
+++ b/src/mailman/interfaces/system.py
@@ -17,7 +17,7 @@
 
 """System information."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/template.py b/src/mailman/interfaces/template.py
index 24f956b78..6b6bcd7a3 100644
--- a/src/mailman/interfaces/template.py
+++ b/src/mailman/interfaces/template.py
@@ -17,7 +17,7 @@
 
 """Template downloader with cache."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/user.py b/src/mailman/interfaces/user.py
index a6c470b6e..e103f38fd 100644
--- a/src/mailman/interfaces/user.py
+++ b/src/mailman/interfaces/user.py
@@ -17,8 +17,8 @@
 
 """Interface describing the basics of a user."""
 
-from mailman import public
 from mailman.interfaces.address import AddressError
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/usermanager.py b/src/mailman/interfaces/usermanager.py
index 87d4bf6e2..4cd8af7aa 100644
--- a/src/mailman/interfaces/usermanager.py
+++ b/src/mailman/interfaces/usermanager.py
@@ -17,7 +17,7 @@
 
 """Interface describing the user management service."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/interfaces/workflow.py b/src/mailman/interfaces/workflow.py
index 9846f4683..b0b5a23da 100644
--- a/src/mailman/interfaces/workflow.py
+++ b/src/mailman/interfaces/workflow.py
@@ -17,7 +17,7 @@
 
 """Interfaces describing the state of a workflow."""
 
-from mailman import public
+from public import public
 from zope.interface import Attribute, Interface
 
 
diff --git a/src/mailman/languages/language.py b/src/mailman/languages/language.py
index 014852c5c..afe217048 100644
--- a/src/mailman/languages/language.py
+++ b/src/mailman/languages/language.py
@@ -18,8 +18,8 @@
 """The representation of a language."""
 
 
-from mailman import public
 from mailman.interfaces.languages import ILanguage
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/languages/manager.py b/src/mailman/languages/manager.py
index 9832eb3eb..5e56ec0e0 100644
--- a/src/mailman/languages/manager.py
+++ b/src/mailman/languages/manager.py
@@ -17,10 +17,10 @@
 
 """Language manager."""
 
-from mailman import public
 from mailman.interfaces.configuration import ConfigurationUpdatedEvent
 from mailman.interfaces.languages import ILanguageManager
 from mailman.languages.language import Language
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/model/address.py b/src/mailman/model/address.py
index a31e9a429..63896c728 100644
--- a/src/mailman/model/address.py
+++ b/src/mailman/model/address.py
@@ -18,12 +18,12 @@
 """Model for addresses."""
 
 from email.utils import formataddr
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.types import SAUnicode
 from mailman.interfaces.address import (
     AddressVerificationEvent, IAddress, IEmailValidator)
 from mailman.utilities.datetime import now
+from public import public
 from sqlalchemy import Column, DateTime, ForeignKey, Integer
 from sqlalchemy.orm import backref, relationship
 from zope.component import getUtility
diff --git a/src/mailman/model/autorespond.py b/src/mailman/model/autorespond.py
index 20c19889f..e9509c4f8 100644
--- a/src/mailman/model/autorespond.py
+++ b/src/mailman/model/autorespond.py
@@ -17,13 +17,13 @@
 
 """Autoresponder records."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import Enum
 from mailman.interfaces.autorespond import (
     IAutoResponseRecord, IAutoResponseSet, Response)
 from mailman.utilities.datetime import today
+from public import public
 from sqlalchemy import Column, Date, ForeignKey, Integer, desc
 from sqlalchemy.orm import relationship
 from zope.interface import implementer
diff --git a/src/mailman/model/bans.py b/src/mailman/model/bans.py
index c8d43c5ae..1c4cbde8c 100644
--- a/src/mailman/model/bans.py
+++ b/src/mailman/model/bans.py
@@ -19,12 +19,12 @@
 
 import re
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import SAUnicode
 from mailman.interfaces.bans import IBan, IBanManager
 from mailman.utilities.queries import QuerySequence
+from public import public
 from sqlalchemy import Column, Integer
 from zope.interface import implementer
 
diff --git a/src/mailman/model/bounce.py b/src/mailman/model/bounce.py
index 856d91f20..6db55a3c7 100644
--- a/src/mailman/model/bounce.py
+++ b/src/mailman/model/bounce.py
@@ -17,13 +17,13 @@
 
 """Bounce support."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import Enum, SAUnicode
 from mailman.interfaces.bounce import (
     BounceContext, IBounceEvent, IBounceProcessor)
 from mailman.utilities.datetime import now
+from public import public
 from sqlalchemy import Boolean, Column, DateTime, Integer
 from zope.interface import implementer
 
diff --git a/src/mailman/model/cache.py b/src/mailman/model/cache.py
index 6be5fbc9d..d1ef9f05c 100644
--- a/src/mailman/model/cache.py
+++ b/src/mailman/model/cache.py
@@ -22,13 +22,13 @@ import hashlib
 
 from contextlib import ExitStack
 from lazr.config import as_timedelta
-from mailman import public
 from mailman.config import config
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import SAUnicode
 from mailman.interfaces.cache import ICacheManager
 from mailman.utilities.datetime import now
+from public import public
 from sqlalchemy import Boolean, Column, DateTime, Integer
 from zope.interface import implementer
 
diff --git a/src/mailman/model/digests.py b/src/mailman/model/digests.py
index ac49249cc..a0daaebbc 100644
--- a/src/mailman/model/digests.py
+++ b/src/mailman/model/digests.py
@@ -17,11 +17,11 @@
 
 """One last digest."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.types import Enum
 from mailman.interfaces.digests import IOneLastDigest
 from mailman.interfaces.member import DeliveryMode
+from public import public
 from sqlalchemy import Column, ForeignKey, Integer
 from sqlalchemy.orm import relationship
 from zope.interface import implementer
diff --git a/src/mailman/model/domain.py b/src/mailman/model/domain.py
index 5bb569585..2622ba80b 100644
--- a/src/mailman/model/domain.py
+++ b/src/mailman/model/domain.py
@@ -17,7 +17,6 @@
 
 """Domains."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import SAUnicode
@@ -27,6 +26,7 @@ from mailman.interfaces.domain import (
 from mailman.interfaces.user import IUser
 from mailman.interfaces.usermanager import IUserManager
 from mailman.model.mailinglist import MailingList
+from public import public
 from sqlalchemy import Column, Integer
 from sqlalchemy.orm import relationship
 from zope.component import getUtility
diff --git a/src/mailman/model/language.py b/src/mailman/model/language.py
index 596e580e1..c762b9715 100644
--- a/src/mailman/model/language.py
+++ b/src/mailman/model/language.py
@@ -17,10 +17,10 @@
 
 """Model for languages."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.types import SAUnicode
 from mailman.interfaces.languages import ILanguage
+from public import public
 from sqlalchemy import Column, Integer
 from zope.interface import implementer
 
diff --git a/src/mailman/model/listmanager.py b/src/mailman/model/listmanager.py
index e2519af5b..bd07e6c27 100644
--- a/src/mailman/model/listmanager.py
+++ b/src/mailman/model/listmanager.py
@@ -17,7 +17,6 @@
 
 """A mailing list manager."""
 
-from mailman import public
 from mailman.database.transaction import dbconnection
 from mailman.interfaces.address import InvalidEmailAddressError
 from mailman.interfaces.listmanager import (
@@ -30,6 +29,7 @@ from mailman.model.mailinglist import (
 from mailman.model.mime import ContentFilter
 from mailman.utilities.datetime import now
 from mailman.utilities.queries import QuerySequence
+from public import public
 from zope.event import notify
 from zope.interface import implementer
 
diff --git a/src/mailman/model/mailinglist.py b/src/mailman/model/mailinglist.py
index eec58ad04..bd6538aaf 100644
--- a/src/mailman/model/mailinglist.py
+++ b/src/mailman/model/mailinglist.py
@@ -19,7 +19,6 @@
 
 import os
 
-from mailman import public
 from mailman.config import config
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
@@ -49,6 +48,7 @@ from mailman.model.mime import ContentFilter
 from mailman.model.preferences import Preferences
 from mailman.utilities.filesystem import makedirs
 from mailman.utilities.string import expand
+from public import public
 from sqlalchemy import (
     Boolean, Column, DateTime, Float, ForeignKey, Integer, Interval,
     LargeBinary, PickleType)
diff --git a/src/mailman/model/member.py b/src/mailman/model/member.py
index aacaa73b6..93d0c7feb 100644
--- a/src/mailman/model/member.py
+++ b/src/mailman/model/member.py
@@ -17,7 +17,6 @@
 
 """Model for members."""
 
-from mailman import public
 from mailman.core.constants import system_preferences
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
@@ -30,6 +29,7 @@ from mailman.interfaces.member import (
 from mailman.interfaces.user import IUser, UnverifiedAddressError
 from mailman.interfaces.usermanager import IUserManager
 from mailman.utilities.uid import UIDFactory
+from public import public
 from sqlalchemy import Column, ForeignKey, Integer
 from sqlalchemy.orm import relationship
 from zope.component import getUtility
diff --git a/src/mailman/model/message.py b/src/mailman/model/message.py
index 576baab5c..233e8b5b5 100644
--- a/src/mailman/model/message.py
+++ b/src/mailman/model/message.py
@@ -17,11 +17,11 @@
 
 """Model for messages."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import SAUnicode
 from mailman.interfaces.messages import IMessage
+from public import public
 from sqlalchemy import Column, Integer
 from zope.interface import implementer
 
diff --git a/src/mailman/model/messagestore.py b/src/mailman/model/messagestore.py
index 8949c56c6..dc037c44f 100644
--- a/src/mailman/model/messagestore.py
+++ b/src/mailman/model/messagestore.py
@@ -21,13 +21,13 @@ import os
 import errno
 import pickle
 
-from mailman import public
 from mailman.config import config
 from mailman.database.transaction import dbconnection
 from mailman.interfaces.messages import IMessageStore
 from mailman.model.message import Message
 from mailman.utilities.email import add_message_hash
 from mailman.utilities.filesystem import makedirs, safe_remove
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/model/mime.py b/src/mailman/model/mime.py
index da5f11f05..a21cfb35d 100644
--- a/src/mailman/model/mime.py
+++ b/src/mailman/model/mime.py
@@ -17,10 +17,10 @@
 
 """The content filter."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.types import Enum, SAUnicode
 from mailman.interfaces.mime import FilterType, IContentFilter
+from public import public
 from sqlalchemy import Column, ForeignKey, Integer
 from sqlalchemy.orm import relationship
 from zope.interface import implementer
diff --git a/src/mailman/model/pending.py b/src/mailman/model/pending.py
index 7e7f0b2eb..5889f9cc1 100644
--- a/src/mailman/model/pending.py
+++ b/src/mailman/model/pending.py
@@ -20,7 +20,6 @@
 import json
 
 from lazr.config import as_timedelta
-from mailman import public
 from mailman.config import config
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
@@ -29,6 +28,7 @@ from mailman.interfaces.pending import (
     IPendable, IPended, IPendedKeyValue, IPendings)
 from mailman.utilities.datetime import now
 from mailman.utilities.uid import TokenFactory
+from public import public
 from sqlalchemy import Column, DateTime, ForeignKey, Integer, and_
 from sqlalchemy.orm import aliased, relationship
 from zope.interface import implementer
diff --git a/src/mailman/model/preferences.py b/src/mailman/model/preferences.py
index 366ed97c2..4e57ce659 100644
--- a/src/mailman/model/preferences.py
+++ b/src/mailman/model/preferences.py
@@ -17,13 +17,13 @@
 
 """Model for preferences."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import Enum, SAUnicode
 from mailman.interfaces.languages import ILanguageManager
 from mailman.interfaces.member import DeliveryMode, DeliveryStatus
 from mailman.interfaces.preferences import IPreferences
+from public import public
 from sqlalchemy import Boolean, Column, Integer
 from zope.component import getUtility
 from zope.interface import implementer
diff --git a/src/mailman/model/requests.py b/src/mailman/model/requests.py
index 0f0f96dfe..04717f49a 100644
--- a/src/mailman/model/requests.py
+++ b/src/mailman/model/requests.py
@@ -18,7 +18,6 @@
 """Implementations of the pending requests interfaces."""
 
 from datetime import timedelta
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import Enum, SAUnicode
@@ -26,6 +25,7 @@ from mailman.interfaces.pending import IPendable, IPendings
 from mailman.interfaces.requests import IListRequests, RequestType
 from mailman.utilities.queries import QuerySequence
 from pickle import dumps, loads
+from public import public
 from sqlalchemy import Column, ForeignKey, Integer
 from sqlalchemy.orm import relationship
 from zope.component import getUtility
diff --git a/src/mailman/model/roster.py b/src/mailman/model/roster.py
index 5dc0423b2..d3dc1b661 100644
--- a/src/mailman/model/roster.py
+++ b/src/mailman/model/roster.py
@@ -22,12 +22,12 @@ the ones that fit a particular role.  These are used as the member, owner,
 moderator, and administrator roster filters.
 """
 
-from mailman import public
 from mailman.database.transaction import dbconnection
 from mailman.interfaces.member import DeliveryMode, MemberRole
 from mailman.interfaces.roster import IRoster
 from mailman.model.address import Address
 from mailman.model.member import Member
+from public import public
 from sqlalchemy import or_
 from zope.interface import implementer
 
diff --git a/src/mailman/model/subscriptions.py b/src/mailman/model/subscriptions.py
index d3fdc3a8a..485524a68 100644
--- a/src/mailman/model/subscriptions.py
+++ b/src/mailman/model/subscriptions.py
@@ -17,7 +17,6 @@
 
 """Subscription services."""
 
-from mailman import public
 from mailman.app.membership import delete_member
 from mailman.database.transaction import dbconnection
 from mailman.interfaces.listmanager import IListManager, NoSuchListError
@@ -30,6 +29,7 @@ from mailman.model.member import Member
 from mailman.model.user import User
 from mailman.utilities.queries import QuerySequence
 from operator import attrgetter
+from public import public
 from sqlalchemy.orm.exc import MultipleResultsFound, NoResultFound
 from zope.component import getUtility
 from zope.interface import implementer
diff --git a/src/mailman/model/template.py b/src/mailman/model/template.py
index b09c644bb..eb776293f 100644
--- a/src/mailman/model/template.py
+++ b/src/mailman/model/template.py
@@ -19,7 +19,6 @@
 
 import logging
 
-from mailman import public
 from mailman.config import config
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
@@ -32,6 +31,7 @@ from mailman.interfaces.template import (
 from mailman.utilities import protocols
 from mailman.utilities.i18n import find
 from mailman.utilities.string import expand
+from public import public
 from requests import HTTPError
 from sqlalchemy import Column, Integer
 from urllib.error import URLError
diff --git a/src/mailman/model/uid.py b/src/mailman/model/uid.py
index 2cf61668f..9daefa318 100644
--- a/src/mailman/model/uid.py
+++ b/src/mailman/model/uid.py
@@ -17,10 +17,10 @@
 
 """Unique IDs."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import UUID
+from public import public
 from sqlalchemy import Column, Integer
 
 
diff --git a/src/mailman/model/user.py b/src/mailman/model/user.py
index edda2a9e8..dc9c097d5 100644
--- a/src/mailman/model/user.py
+++ b/src/mailman/model/user.py
@@ -17,7 +17,6 @@
 
 """Model for users."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import SAUnicode, UUID
@@ -31,6 +30,7 @@ from mailman.model.preferences import Preferences
 from mailman.model.roster import Memberships
 from mailman.utilities.datetime import factory as date_factory
 from mailman.utilities.uid import UIDFactory
+from public import public
 from sqlalchemy import (
     Boolean, Column, DateTime, ForeignKey, Integer)
 from sqlalchemy.orm import backref, relationship
diff --git a/src/mailman/model/usermanager.py b/src/mailman/model/usermanager.py
index fba8e2ec0..2a62e0cf1 100644
--- a/src/mailman/model/usermanager.py
+++ b/src/mailman/model/usermanager.py
@@ -17,7 +17,6 @@
 
 """A user manager."""
 
-from mailman import public
 from mailman.database.transaction import dbconnection
 from mailman.interfaces.address import ExistingAddressError
 from mailman.interfaces.usermanager import IUserManager
@@ -27,6 +26,7 @@ from mailman.model.digests import OneLastDigest
 from mailman.model.member import Member
 from mailman.model.preferences import Preferences
 from mailman.model.user import User
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/model/workflow.py b/src/mailman/model/workflow.py
index 53763a0e8..8b782b5e0 100644
--- a/src/mailman/model/workflow.py
+++ b/src/mailman/model/workflow.py
@@ -17,11 +17,11 @@
 
 """Model for workflow states."""
 
-from mailman import public
 from mailman.database.model import Model
 from mailman.database.transaction import dbconnection
 from mailman.database.types import SAUnicode
 from mailman.interfaces.workflow import IWorkflowState, IWorkflowStateManager
+from public import public
 from sqlalchemy import Column
 from zope.interface import implementer
 
diff --git a/src/mailman/mta/aliases.py b/src/mailman/mta/aliases.py
index dc434c613..889375c04 100644
--- a/src/mailman/mta/aliases.py
+++ b/src/mailman/mta/aliases.py
@@ -17,8 +17,8 @@
 
 """Utility for generating all the aliases of a mailing list."""
 
-from mailman import public
 from mailman.interfaces.mta import IMailTransportAgentAliases
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/mta/base.py b/src/mailman/mta/base.py
index 679faefd5..4f5bb1d58 100644
--- a/src/mailman/mta/base.py
+++ b/src/mailman/mta/base.py
@@ -22,10 +22,10 @@ import socket
 import logging
 import smtplib
 
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.mta import IMailTransportAgentDelivery
 from mailman.mta.connection import Connection
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/mta/bulk.py b/src/mailman/mta/bulk.py
index 1741e0d4c..91b04957a 100644
--- a/src/mailman/mta/bulk.py
+++ b/src/mailman/mta/bulk.py
@@ -17,8 +17,8 @@
 
 """Bulk message delivery."""
 
-from mailman import public
 from mailman.mta.base import BaseDelivery
+from public import public
 
 
 # A mapping of top-level domains to bucket numbers.  The zeroth bucket is
diff --git a/src/mailman/mta/connection.py b/src/mailman/mta/connection.py
index 44cc31d86..318bc5e8e 100644
--- a/src/mailman/mta/connection.py
+++ b/src/mailman/mta/connection.py
@@ -22,8 +22,8 @@ import smtplib
 
 from contextlib import suppress
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
+from public import public
 
 
 log = logging.getLogger('mailman.smtp')
diff --git a/src/mailman/mta/decorating.py b/src/mailman/mta/decorating.py
index e9d6f5785..32db852da 100644
--- a/src/mailman/mta/decorating.py
+++ b/src/mailman/mta/decorating.py
@@ -17,9 +17,9 @@
 
 """Individualized delivery with header/footer decorations."""
 
-from mailman import public
 from mailman.config import config
 from mailman.mta.verp import VERPDelivery
+from public import public
 
 
 @public
diff --git a/src/mailman/mta/deliver.py b/src/mailman/mta/deliver.py
index a5a4e2433..7624979bf 100644
--- a/src/mailman/mta/deliver.py
+++ b/src/mailman/mta/deliver.py
@@ -20,7 +20,6 @@
 import time
 import logging
 
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.mailinglist import Personalization
 from mailman.interfaces.mta import SomeRecipientsFailed
@@ -30,6 +29,7 @@ from mailman.mta.decorating import DecoratingMixin
 from mailman.mta.personalized import PersonalizedMixin
 from mailman.mta.verp import VERPMixin
 from mailman.utilities.string import expand
+from public import public
 
 
 COMMA = ','
diff --git a/src/mailman/mta/exim4.py b/src/mailman/mta/exim4.py
index 7151768a8..ec2e77708 100644
--- a/src/mailman/mta/exim4.py
+++ b/src/mailman/mta/exim4.py
@@ -17,8 +17,8 @@
 
 """Creation/deletion hooks for the Exim4 MTA."""
 
-from mailman import public
 from mailman.interfaces.mta import IMailTransportAgentLifecycle
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/mta/null.py b/src/mailman/mta/null.py
index 165c5f0ee..e5368e689 100644
--- a/src/mailman/mta/null.py
+++ b/src/mailman/mta/null.py
@@ -20,8 +20,8 @@
 Exim one example of an MTA that Just Works.
 """
 
-from mailman import public
 from mailman.interfaces.mta import IMailTransportAgentLifecycle
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/mta/personalized.py b/src/mailman/mta/personalized.py
index 7cfbfff43..01ba686f3 100644
--- a/src/mailman/mta/personalized.py
+++ b/src/mailman/mta/personalized.py
@@ -19,10 +19,10 @@
 
 from email.header import Header
 from email.utils import formataddr
-from mailman import public
 from mailman.interfaces.mailinglist import Personalization
 from mailman.interfaces.usermanager import IUserManager
 from mailman.mta.verp import VERPDelivery
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/mta/postfix.py b/src/mailman/mta/postfix.py
index ff4b92117..07bf17a22 100644
--- a/src/mailman/mta/postfix.py
+++ b/src/mailman/mta/postfix.py
@@ -21,7 +21,6 @@ import os
 import logging
 
 from flufl.lock import Lock
-from mailman import public
 from mailman.config import config
 from mailman.config.config import external_configuration
 from mailman.interfaces.listmanager import IListManager
@@ -29,6 +28,7 @@ from mailman.interfaces.mta import (
     IMailTransportAgentAliases, IMailTransportAgentLifecycle)
 from mailman.utilities.datetime import now
 from operator import attrgetter
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/mta/verp.py b/src/mailman/mta/verp.py
index 8ede6cb67..6ce80c795 100644
--- a/src/mailman/mta/verp.py
+++ b/src/mailman/mta/verp.py
@@ -19,11 +19,11 @@
 
 import logging
 
-from mailman import public
 from mailman.config import config
 from mailman.mta.base import IndividualDelivery
 from mailman.utilities.email import split_email
 from mailman.utilities.string import expand
+from public import public
 
 
 DOT = '.'
diff --git a/src/mailman/rest/addresses.py b/src/mailman/rest/addresses.py
index f0cb8edef..8e8b543b9 100644
--- a/src/mailman/rest/addresses.py
+++ b/src/mailman/rest/addresses.py
@@ -17,7 +17,6 @@
 
 """REST for addresses."""
 
-from mailman import public
 from mailman.interfaces.address import (
     ExistingAddressError, InvalidEmailAddressError)
 from mailman.interfaces.usermanager import IUserManager
@@ -29,6 +28,7 @@ from mailman.rest.preferences import Preferences
 from mailman.rest.validator import Validator
 from mailman.utilities.datetime import now
 from operator import attrgetter
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/bans.py b/src/mailman/rest/bans.py
index ce575885b..981c1b549 100644
--- a/src/mailman/rest/bans.py
+++ b/src/mailman/rest/bans.py
@@ -17,12 +17,12 @@
 
 """REST for banned emails."""
 
-from mailman import public
 from mailman.interfaces.bans import IBanManager
 from mailman.rest.helpers import (
     CollectionMixin, bad_request, child, created, etag, no_content, not_found,
     okay)
 from mailman.rest.validator import Validator
+from public import public
 
 
 class _BannedBase:
diff --git a/src/mailman/rest/docs/__init__.py b/src/mailman/rest/docs/__init__.py
index 5a039ac3d..dc27a6525 100644
--- a/src/mailman/rest/docs/__init__.py
+++ b/src/mailman/rest/docs/__init__.py
@@ -20,9 +20,9 @@
 import threading
 
 from http.server import BaseHTTPRequestHandler, HTTPServer
-from mailman import public
 from mailman.testing.helpers import wait_for_webservice
 from mailman.testing.layers import RESTLayer
+from public import public
 
 
 # New in Python 3.5.
diff --git a/src/mailman/rest/domains.py b/src/mailman/rest/domains.py
index c6b8daa7c..ce96204b4 100644
--- a/src/mailman/rest/domains.py
+++ b/src/mailman/rest/domains.py
@@ -17,7 +17,6 @@
 
 """REST for domains."""
 
-from mailman import public
 from mailman.interfaces.domain import (
     BadDomainSpecificationError, IDomainManager)
 from mailman.rest.helpers import (
@@ -27,6 +26,7 @@ from mailman.rest.lists import ListsForDomain
 from mailman.rest.uris import ADomainURI, AllDomainURIs
 from mailman.rest.users import ListOfDomainOwners, OwnersForDomain
 from mailman.rest.validator import Validator, list_of_strings_validator
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/header_matches.py b/src/mailman/rest/header_matches.py
index 25c519ef3..13dad97ad 100644
--- a/src/mailman/rest/header_matches.py
+++ b/src/mailman/rest/header_matches.py
@@ -17,13 +17,13 @@
 
 """REST API for a mailing list's header matches."""
 
-from mailman import public
 from mailman.interfaces.action import Action
 from mailman.interfaces.mailinglist import IHeaderMatchList
 from mailman.rest.helpers import (
     CollectionMixin, bad_request, child, created, etag, no_content, not_found,
     okay)
 from mailman.rest.validator import Validator, enum_validator
+from public import public
 
 
 def lowercase(value):
diff --git a/src/mailman/rest/helpers.py b/src/mailman/rest/helpers.py
index a4b072408..6b45eb78a 100644
--- a/src/mailman/rest/helpers.py
+++ b/src/mailman/rest/helpers.py
@@ -27,9 +27,9 @@ from email.header import Header
 from email.message import Message
 from enum import Enum
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from pprint import pformat
+from public import public
 
 
 class ExtendedEncoder(json.JSONEncoder):
diff --git a/src/mailman/rest/listconf.py b/src/mailman/rest/listconf.py
index 861e54dd1..94598b0ab 100644
--- a/src/mailman/rest/listconf.py
+++ b/src/mailman/rest/listconf.py
@@ -18,7 +18,6 @@
 """Mailing list configuration via REST API."""
 
 from lazr.config import as_boolean, as_timedelta
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.action import Action
 from mailman.interfaces.archiver import ArchivePolicy
@@ -32,6 +31,7 @@ from mailman.rest.helpers import (
 from mailman.rest.validator import (
     PatchValidator, ReadOnlyPATCHRequestError, UnknownPATCHRequestError,
     Validator, enum_validator, list_of_strings_validator)
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/lists.py b/src/mailman/rest/lists.py
index 1fdf595fb..cdebdebd9 100644
--- a/src/mailman/rest/lists.py
+++ b/src/mailman/rest/lists.py
@@ -18,7 +18,6 @@
 """REST for mailing lists."""
 
 from lazr.config import as_boolean
-from mailman import public
 from mailman.app.digests import (
     bump_digest_number_and_volume, maybe_send_digest_now)
 from mailman.app.lifecycle import create_list, remove_list
@@ -41,6 +40,7 @@ from mailman.rest.post_moderation import HeldMessages
 from mailman.rest.sub_moderation import SubscriptionRequests
 from mailman.rest.uris import AListURI, AllListURIs
 from mailman.rest.validator import Validator, list_of_strings_validator
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/members.py b/src/mailman/rest/members.py
index b35440af4..ea7eaa394 100644
--- a/src/mailman/rest/members.py
+++ b/src/mailman/rest/members.py
@@ -17,7 +17,6 @@
 
 """REST for members."""
 
-from mailman import public
 from mailman.app.membership import add_member, delete_member
 from mailman.interfaces.action import Action
 from mailman.interfaces.address import IAddress
@@ -36,6 +35,7 @@ from mailman.rest.helpers import (
 from mailman.rest.preferences import Preferences, ReadOnlyPreferences
 from mailman.rest.validator import (
     Validator, enum_validator, subscriber_validator)
+from public import public
 from uuid import UUID
 from zope.component import getUtility
 
diff --git a/src/mailman/rest/post_moderation.py b/src/mailman/rest/post_moderation.py
index 33a32de20..9a56ada00 100644
--- a/src/mailman/rest/post_moderation.py
+++ b/src/mailman/rest/post_moderation.py
@@ -17,7 +17,6 @@
 
 """REST API for held message moderation."""
 
-from mailman import public
 from mailman.app.moderator import handle_message
 from mailman.interfaces.action import Action
 from mailman.interfaces.messages import IMessageStore
@@ -25,6 +24,7 @@ from mailman.interfaces.requests import IListRequests, RequestType
 from mailman.rest.helpers import (
     CollectionMixin, bad_request, child, etag, no_content, not_found, okay)
 from mailman.rest.validator import Validator, enum_validator
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/preferences.py b/src/mailman/rest/preferences.py
index cf26380fe..549751d1e 100644
--- a/src/mailman/rest/preferences.py
+++ b/src/mailman/rest/preferences.py
@@ -18,12 +18,12 @@
 """Preferences."""
 
 from lazr.config import as_boolean
-from mailman import public
 from mailman.interfaces.member import DeliveryMode, DeliveryStatus
 from mailman.rest.helpers import (
     GetterSetter, bad_request, etag, no_content, not_found, okay)
 from mailman.rest.validator import (
     Validator, enum_validator, language_validator)
+from public import public
 
 
 PREFERENCES = (
diff --git a/src/mailman/rest/queues.py b/src/mailman/rest/queues.py
index 9fa5b9dc6..27e9c698e 100644
--- a/src/mailman/rest/queues.py
+++ b/src/mailman/rest/queues.py
@@ -17,13 +17,13 @@
 
 """<api>/queues."""
 
-from mailman import public
 from mailman.app.inject import inject_text
 from mailman.config import config
 from mailman.interfaces.listmanager import IListManager
 from mailman.rest.helpers import (
     CollectionMixin, bad_request, created, etag, no_content, not_found, okay)
 from mailman.rest.validator import Validator
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/root.py b/src/mailman/rest/root.py
index 7f6be0353..c4c0b865f 100644
--- a/src/mailman/rest/root.py
+++ b/src/mailman/rest/root.py
@@ -17,7 +17,6 @@
 
 """The root of the REST API."""
 
-from mailman import public
 from mailman.config import config
 from mailman.core.api import API30, API31
 from mailman.core.constants import system_preferences
@@ -36,6 +35,7 @@ from mailman.rest.queues import AQueue, AQueueFile, AllQueues
 from mailman.rest.templates import TemplateFinder
 from mailman.rest.uris import ASiteURI, AllSiteURIs
 from mailman.rest.users import AUser, AllUsers, ServerOwners
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/sub_moderation.py b/src/mailman/rest/sub_moderation.py
index 55b6a7609..39976826c 100644
--- a/src/mailman/rest/sub_moderation.py
+++ b/src/mailman/rest/sub_moderation.py
@@ -17,7 +17,6 @@
 
 """REST API for held subscription requests."""
 
-from mailman import public
 from mailman.app.moderator import send_rejection
 from mailman.core.i18n import _
 from mailman.interfaces.action import Action
@@ -28,6 +27,7 @@ from mailman.rest.helpers import (
     CollectionMixin, bad_request, child, conflict, etag, no_content,
     not_found, okay)
 from mailman.rest.validator import Validator, enum_validator
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/templates.py b/src/mailman/rest/templates.py
index fe5e34a8e..7f4e5a3af 100644
--- a/src/mailman/rest/templates.py
+++ b/src/mailman/rest/templates.py
@@ -17,9 +17,9 @@
 
 """Template finder."""
 
-from mailman import public
 from mailman.rest.helpers import not_found
 from mailman.utilities.i18n import TemplateNotFoundError, find
+from public import public
 
 
 # Use mimetypes.guess_all_extensions()?
diff --git a/src/mailman/rest/uris.py b/src/mailman/rest/uris.py
index 2fc062262..d94b3b237 100644
--- a/src/mailman/rest/uris.py
+++ b/src/mailman/rest/uris.py
@@ -17,12 +17,12 @@
 
 """URI templates."""
 
-from mailman import public
 from mailman.interfaces.template import ALL_TEMPLATES, ITemplateManager
 from mailman.rest.helpers import (
     CollectionMixin, bad_request, etag, no_content, not_found, okay)
 from mailman.rest.validator import Validator
 from operator import attrgetter
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/users.py b/src/mailman/rest/users.py
index f9ce9b132..c50bfe3d0 100644
--- a/src/mailman/rest/users.py
+++ b/src/mailman/rest/users.py
@@ -19,7 +19,6 @@
 
 from functools import lru_cache
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from mailman.interfaces.address import ExistingAddressError
 from mailman.interfaces.usermanager import IUserManager
@@ -32,6 +31,7 @@ from mailman.rest.validator import (
     PatchValidator, ReadOnlyPATCHRequestError, UnknownPATCHRequestError,
     Validator, list_of_strings_validator)
 from passlib.utils import generate_password as generate
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/validator.py b/src/mailman/rest/validator.py
index 19e8d684a..439c25b8e 100644
--- a/src/mailman/rest/validator.py
+++ b/src/mailman/rest/validator.py
@@ -17,10 +17,10 @@
 
 """REST web form validation."""
 
-from mailman import public
 from mailman.interfaces.address import IEmailValidator
 from mailman.interfaces.errors import MailmanError
 from mailman.interfaces.languages import ILanguageManager
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/rest/wsgiapp.py b/src/mailman/rest/wsgiapp.py
index 3ba122c00..b2dbc7409 100644
--- a/src/mailman/rest/wsgiapp.py
+++ b/src/mailman/rest/wsgiapp.py
@@ -23,10 +23,10 @@ import logging
 from base64 import b64decode
 from falcon import API, HTTPUnauthorized
 from falcon.routing import create_http_method_map
-from mailman import public
 from mailman.config import config
 from mailman.database.transaction import transactional
 from mailman.rest.root import Root
+from public import public
 from wsgiref.simple_server import (
     WSGIRequestHandler, WSGIServer, make_server as wsgi_server)
 
diff --git a/src/mailman/rules/administrivia.py b/src/mailman/rules/administrivia.py
index e5defee6e..6dc6c38b4 100644
--- a/src/mailman/rules/administrivia.py
+++ b/src/mailman/rules/administrivia.py
@@ -18,10 +18,10 @@
 """The administrivia rule."""
 
 from email.iterators import typed_subpart_iterator
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 # The list of email commands we search for in the Subject header and payload.
diff --git a/src/mailman/rules/any.py b/src/mailman/rules/any.py
index 466735ebe..6d3bbe21f 100644
--- a/src/mailman/rules/any.py
+++ b/src/mailman/rules/any.py
@@ -17,9 +17,9 @@
 
 """Check if any previous rules have matched."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/approved.py b/src/mailman/rules/approved.py
index a4ea1145e..66f21c8eb 100644
--- a/src/mailman/rules/approved.py
+++ b/src/mailman/rules/approved.py
@@ -20,10 +20,10 @@
 import re
 
 from email.iterators import typed_subpart_iterator
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/banned_address.py b/src/mailman/rules/banned_address.py
index 8ed33a5e6..850f101db 100644
--- a/src/mailman/rules/banned_address.py
+++ b/src/mailman/rules/banned_address.py
@@ -17,10 +17,10 @@
 
 """Banned addresses rule."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.bans import IBanManager
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/emergency.py b/src/mailman/rules/emergency.py
index 442ccf136..59c0c6a84 100644
--- a/src/mailman/rules/emergency.py
+++ b/src/mailman/rules/emergency.py
@@ -17,9 +17,9 @@
 
 """The emergency hold rule."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/implicit_dest.py b/src/mailman/rules/implicit_dest.py
index c0e116d1c..88429a6ac 100644
--- a/src/mailman/rules/implicit_dest.py
+++ b/src/mailman/rules/implicit_dest.py
@@ -21,10 +21,10 @@ import re
 
 from contextlib import suppress
 from email.utils import getaddresses
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.mailinglist import IAcceptableAliasSet
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/loop.py b/src/mailman/rules/loop.py
index 0f8047e76..d9b7c299d 100644
--- a/src/mailman/rules/loop.py
+++ b/src/mailman/rules/loop.py
@@ -17,9 +17,9 @@
 
 """Look for a posting loop."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/max_recipients.py b/src/mailman/rules/max_recipients.py
index 61df613cb..1d38e28c1 100644
--- a/src/mailman/rules/max_recipients.py
+++ b/src/mailman/rules/max_recipients.py
@@ -18,9 +18,9 @@
 """The maximum number of recipients rule."""
 
 from email.utils import getaddresses
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/max_size.py b/src/mailman/rules/max_size.py
index 8911e97fd..c5c492347 100644
--- a/src/mailman/rules/max_size.py
+++ b/src/mailman/rules/max_size.py
@@ -17,9 +17,9 @@
 
 """The maximum message size rule."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/moderation.py b/src/mailman/rules/moderation.py
index 20b238eab..b52ecff3e 100644
--- a/src/mailman/rules/moderation.py
+++ b/src/mailman/rules/moderation.py
@@ -19,13 +19,13 @@
 
 import re
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.action import Action
 from mailman.interfaces.bans import IBanManager
 from mailman.interfaces.member import MemberRole
 from mailman.interfaces.rules import IRule
 from mailman.interfaces.usermanager import IUserManager
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/rules/news_moderation.py b/src/mailman/rules/news_moderation.py
index 63a7e93b0..8d0fe3402 100644
--- a/src/mailman/rules/news_moderation.py
+++ b/src/mailman/rules/news_moderation.py
@@ -17,10 +17,10 @@
 
 """The news moderation rule."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.nntp import NewsgroupModeration
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/no_subject.py b/src/mailman/rules/no_subject.py
index ed020b81e..f3eba625a 100644
--- a/src/mailman/rules/no_subject.py
+++ b/src/mailman/rules/no_subject.py
@@ -17,9 +17,9 @@
 
 """The no-Subject header rule."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/suspicious.py b/src/mailman/rules/suspicious.py
index 679605fd6..049df0a61 100644
--- a/src/mailman/rules/suspicious.py
+++ b/src/mailman/rules/suspicious.py
@@ -20,9 +20,9 @@
 import re
 import logging
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/rules/truth.py b/src/mailman/rules/truth.py
index 9883a0e60..224ceeaad 100644
--- a/src/mailman/rules/truth.py
+++ b/src/mailman/rules/truth.py
@@ -17,9 +17,9 @@
 
 """A rule which always matches."""
 
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/runners/archive.py b/src/mailman/runners/archive.py
index 23b7b164d..073f72d52 100644
--- a/src/mailman/runners/archive.py
+++ b/src/mailman/runners/archive.py
@@ -23,12 +23,12 @@ import logging
 from datetime import datetime
 from email.utils import mktime_tz, parsedate_tz
 from lazr.config import as_timedelta
-from mailman import public
 from mailman.config import config
 from mailman.core.runner import Runner
 from mailman.interfaces.archiver import ClobberDate
 from mailman.interfaces.mailinglist import IListArchiverSet
 from mailman.utilities.datetime import RFC822_DATE_FMT, now
+from public import public
 
 
 log = logging.getLogger('mailman.archiver')
diff --git a/src/mailman/runners/bounce.py b/src/mailman/runners/bounce.py
index 4150dc9b5..40ea840e7 100644
--- a/src/mailman/runners/bounce.py
+++ b/src/mailman/runners/bounce.py
@@ -20,10 +20,10 @@
 import logging
 
 from flufl.bounce import all_failures, scan_message
-from mailman import public
 from mailman.app.bounces import ProbeVERP, StandardVERP, maybe_forward
 from mailman.core.runner import Runner
 from mailman.interfaces.bounce import BounceContext, IBounceProcessor
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/runners/command.py b/src/mailman/runners/command.py
index ba10988e3..a52dd541d 100644
--- a/src/mailman/runners/command.py
+++ b/src/mailman/runners/command.py
@@ -30,13 +30,13 @@ from email.errors import HeaderParseError
 from email.header import decode_header, make_header
 from email.iterators import typed_subpart_iterator
 from io import StringIO
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.core.runner import Runner
 from mailman.email.message import UserNotification
 from mailman.interfaces.command import ContinueProcessing, IEmailResults
 from mailman.interfaces.languages import ILanguageManager
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 
diff --git a/src/mailman/runners/digest.py b/src/mailman/runners/digest.py
index 4971965fa..284056e3a 100644
--- a/src/mailman/runners/digest.py
+++ b/src/mailman/runners/digest.py
@@ -27,7 +27,6 @@ from email.mime.message import MIMEMessage
 from email.mime.text import MIMEText
 from email.utils import formatdate, getaddresses, make_msgid
 from io import StringIO
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.core.runner import Runner
@@ -37,6 +36,7 @@ from mailman.interfaces.member import DeliveryMode, DeliveryStatus
 from mailman.interfaces.template import ITemplateLoader
 from mailman.utilities.mailbox import Mailbox
 from mailman.utilities.string import expand, oneline, wrap
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/runners/incoming.py b/src/mailman/runners/incoming.py
index 62b12dab1..9461e59bc 100644
--- a/src/mailman/runners/incoming.py
+++ b/src/mailman/runners/incoming.py
@@ -27,12 +27,12 @@ immediately.
 """
 
 from contextlib import suppress
-from mailman import public
 from mailman.core.chains import process
 from mailman.core.runner import Runner
 from mailman.database.transaction import transaction
 from mailman.interfaces.address import ExistingAddressError
 from mailman.interfaces.usermanager import IUserManager
+from public import public
 from zope.component import getUtility
 
 
diff --git a/src/mailman/runners/lmtp.py b/src/mailman/runners/lmtp.py
index 21fb44c5e..25d531da4 100644
--- a/src/mailman/runners/lmtp.py
+++ b/src/mailman/runners/lmtp.py
@@ -37,13 +37,10 @@ so that the peer mail server can provide better diagnostics.
 import email
 import socket
 import logging
-import aiosmtpd
-import aiosmtpd.smtp
 
 from aiosmtpd.controller import Controller
 from aiosmtpd.lmtp import LMTP
 from email.utils import parseaddr
-from mailman import public
 from mailman.config import config
 from mailman.core.runner import Runner
 from mailman.database.transaction import transactional
@@ -51,6 +48,7 @@ from mailman.email.message import Message
 from mailman.interfaces.listmanager import IListManager
 from mailman.utilities.datetime import now
 from mailman.utilities.email import add_message_hash
+from public import public
 from zope.component import getUtility
 
 
@@ -93,9 +91,6 @@ ERR_502 = '502 Error: command HELO not implemented'
 ERR_550 = '550 Requested action not taken: mailbox unavailable'
 ERR_550_MID = '550 No Message-ID header provided'
 
-# XXX Blech
-aiosmtpd.smtp.__version__ = 'GNU Mailman LMTP runner 2.0'
-
 
 def split_recipient(address):
     """Split an address into listname, subaddress and domain parts.
@@ -218,7 +213,9 @@ class LMTPHandler:
 
 class LMTPController(Controller):
     def factory(self):
-        return LMTP(self.handler)
+        server = LMTP(self.handler)
+        server.__ident__ = 'GNU Mailman LMTP runner 2.0'
+        return server
 
     def make_socket(self):
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
diff --git a/src/mailman/runners/nntp.py b/src/mailman/runners/nntp.py
index b125fe4f9..38f67c453 100644
--- a/src/mailman/runners/nntp.py
+++ b/src/mailman/runners/nntp.py
@@ -24,10 +24,10 @@ import logging
 import nntplib
 
 from io import StringIO
-from mailman import public
 from mailman.config import config
 from mailman.core.runner import Runner
 from mailman.interfaces.nntp import NewsgroupModeration
+from public import public
 
 
 COMMA = ','
diff --git a/src/mailman/runners/outgoing.py b/src/mailman/runners/outgoing.py
index 3f21e3813..61b6e0b99 100644
--- a/src/mailman/runners/outgoing.py
+++ b/src/mailman/runners/outgoing.py
@@ -22,7 +22,6 @@ import logging
 
 from datetime import datetime
 from lazr.config import as_boolean, as_timedelta
-from mailman import public
 from mailman.config import config
 from mailman.core.runner import Runner
 from mailman.interfaces.bounce import BounceContext, IBounceProcessor
@@ -32,6 +31,7 @@ from mailman.interfaces.pending import IPendings
 from mailman.interfaces.subscriptions import ISubscriptionService
 from mailman.utilities.datetime import now
 from mailman.utilities.modules import find_name
+from public import public
 from uuid import UUID
 from zope.component import getUtility
 
diff --git a/src/mailman/runners/pipeline.py b/src/mailman/runners/pipeline.py
index 3ec7499f2..caa68763c 100644
--- a/src/mailman/runners/pipeline.py
+++ b/src/mailman/runners/pipeline.py
@@ -22,9 +22,9 @@ through the 'preparation pipeline'.  This pipeline adds, deletes and modifies
 headers, calculates message recipients, and more.
 """
 
-from mailman import public
 from mailman.core.pipelines import process
 from mailman.core.runner import Runner
+from public import public
 
 
 @public
diff --git a/src/mailman/runners/rest.py b/src/mailman/runners/rest.py
index 037b6adf8..dd7eae245 100644
--- a/src/mailman/runners/rest.py
+++ b/src/mailman/runners/rest.py
@@ -21,9 +21,9 @@ import signal
 import logging
 import threading
 
-from mailman import public
 from mailman.core.runner import Runner
 from mailman.rest.wsgiapp import make_server
+from public import public
 
 
 log = logging.getLogger('mailman.http')
diff --git a/src/mailman/runners/retry.py b/src/mailman/runners/retry.py
index f1af4f73c..2be89e8b0 100644
--- a/src/mailman/runners/retry.py
+++ b/src/mailman/runners/retry.py
@@ -19,9 +19,9 @@
 
 import time
 
-from mailman import public
 from mailman.config import config
 from mailman.core.runner import Runner
+from public import public
 
 
 @public
diff --git a/src/mailman/runners/virgin.py b/src/mailman/runners/virgin.py
index a69d07bf7..50ef3dcce 100644
--- a/src/mailman/runners/virgin.py
+++ b/src/mailman/runners/virgin.py
@@ -23,9 +23,9 @@ to go through some minimal processing before they can be sent out to the
 recipient.
 """
 
-from mailman import public
 from mailman.core.pipelines import process
 from mailman.core.runner import Runner
+from public import public
 
 
 @public
diff --git a/src/mailman/styles/base.py b/src/mailman/styles/base.py
index 7226d762a..02a17d54d 100644
--- a/src/mailman/styles/base.py
+++ b/src/mailman/styles/base.py
@@ -24,7 +24,6 @@ methods in your compositional derived class.
 
 
 from datetime import timedelta
-from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.action import Action, FilterAction
 from mailman.interfaces.archiver import ArchivePolicy
@@ -34,6 +33,7 @@ from mailman.interfaces.digests import DigestFrequency
 from mailman.interfaces.mailinglist import (
     Personalization, ReplyToMunging, SubscriptionPolicy)
 from mailman.interfaces.nntp import NewsgroupModeration
+from public import public
 
 
 @public
diff --git a/src/mailman/styles/default.py b/src/mailman/styles/default.py
index 2df075a6f..c7632fe8e 100644
--- a/src/mailman/styles/default.py
+++ b/src/mailman/styles/default.py
@@ -17,11 +17,11 @@
 
 """Application of list styles to new and existing lists."""
 
-from mailman import public
 from mailman.interfaces.styles import IStyle
 from mailman.styles.base import (
     Announcement, BasicOperation, Bounces, Discussion, Identity, Moderation,
     Public)
+from public import public
 from zope.interface import implementer
 
 
diff --git a/src/mailman/styles/manager.py b/src/mailman/styles/manager.py
index 1b3130581..ae60dc3c6 100644
--- a/src/mailman/styles/manager.py
+++ b/src/mailman/styles/manager.py
@@ -17,11 +17,11 @@
 
 """Style manager."""
 
-from mailman import public
 from mailman.interfaces.configuration import ConfigurationUpdatedEvent
 from mailman.interfaces.styles import (
     DuplicateStyleError, IStyle, IStyleManager)
 from mailman.utilities.modules import find_components
+from public import public
 from zope.component import getUtility
 from zope.interface import implementer
 from zope.interface.verify import verifyObject
diff --git a/src/mailman/testing/documentation.py b/src/mailman/testing/documentation.py
index 29629fe1b..97e30e900 100644
--- a/src/mailman/testing/documentation.py
+++ b/src/mailman/testing/documentation.py
@@ -22,12 +22,12 @@ distributions.  doctest discovery currently requires file system traversal.
 """
 
 from inspect import isfunction, ismethod
-from mailman import public
 from mailman.app.lifecycle import create_list
 from mailman.config import config
 from mailman.testing.helpers import (
     call_api, get_queue_messages, specialized_message_from_string, subscribe)
 from mailman.testing.layers import SMTPLayer
+from public import public
 
 
 DOT = '.'
diff --git a/src/mailman/testing/flake8.py b/src/mailman/testing/flake8.py
deleted file mode 100644
index 68bd37761..000000000
--- a/src/mailman/testing/flake8.py
+++ /dev/null
@@ -1,141 +0,0 @@
-# Copyright (C) 2016 by the Free Software Foundation, Inc.
-#
-# This file is part of GNU Mailman.
-#
-# GNU Mailman is free software: you can redistribute it and/or modify it under
-# the terms of the GNU General Public License as published by the Free
-# Software Foundation, either version 3 of the License, or (at your option)
-# any later version.
-#
-# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-# more details.
-#
-# You should have received a copy of the GNU General Public License along with
-# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
-
-"""Flake8 extensions for Mailman coding style."""
-
-
-from ast import NodeVisitor
-from collections import namedtuple
-from enum import Enum
-
-
-class ImportType(Enum):
-    non_from = 0
-    from_import = 1
-
-
-ImportRecord = namedtuple('ImportRecord', 'itype lineno colno, module, names')
-
-
-NONFROM_FOLLOWS_FROM = 'B401 Non-from import follows from-import'
-NONFROM_MULTIPLE_NAMES = 'B402 Multiple names on non-from import'
-NONFROM_SHORTER_FOLLOWS = 'B403 Shorter non-from import follows longer'
-NONFROM_ALPHA_UNSORTED = (
-    'B404 Same-length non-from imports not sorted alphabetically')
-NONFROM_EXTRA_BLANK_LINE = (
-    'B405 Unexpected blank line since last non-from import')
-NONFROM_DOTTED_UNSORTED = (
-    'B406 Dotted non-from import not sorted alphabetically')
-
-FROMIMPORT_MISSING_BLANK_LINE = (
-    'B411 Expected one blank line since last non-from import')
-FROMIMPORT_ALPHA_UNSORTED = 'B412 from-import not sorted alphabetically'
-FROMIMPORT_MULTIPLE = 'B413 Multiple from-imports of same module'
-FROMIMPORT_NAMES_UNSORTED = (
-    'B414 from-imported names are not sorted alphabetically')
-
-
-class ImportVisitor(NodeVisitor):
-    def __init__(self):
-        self.imports = []
-
-    def visit_Import(self, node):
-        if node.col_offset != 0:
-            # Ignore nested imports.
-            return
-        names = [alias.name for alias in node.names]
-        self.imports.append(
-            ImportRecord(ImportType.non_from, node.lineno, node.col_offset,
-                         None, names))
-
-    def visit_ImportFrom(self, node):
-        if node.col_offset != 0:
-            # Ignore nested imports.
-            return
-        names = [alias.name for alias in node.names]
-        self.imports.append(
-            ImportRecord(ImportType.from_import, node.lineno, node.col_offset,
-                         node.module, names))
-
-
-class ImportOrder:
-    name = 'flufl-import-order'
-    version = '0.1'
-
-    def __init__(self, tree, filename):
-        self.tree = tree
-        self.filename = filename
-
-    def _error(self, record, error):
-        code, space, text = error.partition(' ')
-        return (record.lineno, record.colno,
-                '{} {}'.format(code, text), ImportOrder)
-
-    def run(self):
-        visitor = ImportVisitor()
-        visitor.visit(self.tree)
-        last_import = None
-        for record in visitor.imports:
-            if last_import is None:
-                last_import = record
-                continue
-            if record.itype is ImportType.non_from:
-                if len(record.names) != 1:
-                    yield self._error(record, NONFROM_MULTIPLE_NAMES)
-                if last_import.itype is ImportType.from_import:
-                    yield self._error(record, NONFROM_FOLLOWS_FROM)
-                # Shorter imports should always precede longer import *except*
-                # when they are dotted imports and everything but the last
-                # path component are the same.  In that case, they should be
-                # sorted alphabetically.
-                last_name = last_import.names[0]
-                this_name = record.names[0]
-                if '.' in last_name and '.' in this_name:
-                    last_parts = last_name.split('.')
-                    this_parts = this_name.split('.')
-                    if (last_parts[:-1] == this_parts[:-1] and
-                            last_parts[-1] > this_parts[-1]):
-                        yield self._error(record, NONFROM_DOTTED_UNSORTED)
-                elif len(last_name) > len(this_name):
-                    yield self._error(record, NONFROM_SHORTER_FOLLOWS)
-                # It's also possible that the imports are the same length, in
-                # which case they must be sorted alphabetically.
-                if (len(last_import.names[0]) == len(record.names[0]) and
-                        last_import.names[0] > record.names[0]):
-                    yield self._error(record, NONFROM_ALPHA_UNSORTED)
-                if last_import.lineno + 1 != record.lineno:
-                    yield self._error(record, NONFROM_DOTTED_UNSORTED)
-            else:
-                assert record.itype is ImportType.from_import
-                if (last_import.itype is ImportType.non_from and
-                        record.lineno != last_import.lineno + 2):
-                    yield self._error(record, FROMIMPORT_MISSING_BLANK_LINE)
-                if last_import.itype is ImportType.non_from:
-                    last_import = record
-                    continue
-                if last_import.module > record.module:
-                    yield self._error(record, FROMIMPORT_ALPHA_UNSORTED)
-                # All imports from the same module should show up in the same
-                # multiline import.
-                if last_import.module == record.module:
-                    yield self._error(record, FROMIMPORT_MULTIPLE)
-                # Check the sort order of the imported names.
-                if sorted(record.names) != record.names:
-                    yield self._error(record, FROMIMPORT_NAMES_UNSORTED)
-                # How to check for no blank lines between from imports?
-            # Update the last import.
-            last_import = record
diff --git a/src/mailman/testing/helpers.py b/src/mailman/testing/helpers.py
index 2ce6956b7..233b03cf8 100644
--- a/src/mailman/testing/helpers.py
+++ b/src/mailman/testing/helpers.py
@@ -35,7 +35,6 @@ from contextlib import contextmanager, suppress
 from email import message_from_string
 from httplib2 import Http
 from lazr.config import as_timedelta
-from mailman import public
 from mailman.bin.master import Loop as Master
 from mailman.config import config
 from mailman.database.transaction import transaction
@@ -46,6 +45,7 @@ from mailman.interfaces.styles import IStyleManager
 from mailman.interfaces.usermanager import IUserManager
 from mailman.runners.digest import DigestRunner
 from mailman.utilities.mailbox import Mailbox
+from public import public
 from unittest import mock
 from urllib.error import HTTPError
 from urllib.parse import urlencode
@@ -568,3 +568,11 @@ def hackenv(envar, new_value):
                 del os.environ[envar]
         else:
             os.environ[envar] = old_value
+
+
+def nose2_start_test_run_callback(plugin):
+    from mailman.testing.layers import ConfigLayer, MockAndMonkeyLayer
+    MockAndMonkeyLayer.testing_mode = True
+    if (plugin.stderr or
+            len(os.environ.get('MM_VERBOSE_TESTLOG', '').strip()) > 0):
+        ConfigLayer.stderr = True
diff --git a/src/mailman/testing/i18n.py b/src/mailman/testing/i18n.py
index 2031be307..ade8584b1 100644
--- a/src/mailman/testing/i18n.py
+++ b/src/mailman/testing/i18n.py
@@ -20,8 +20,8 @@
 from contextlib import closing
 from flufl.i18n import registry
 from gettext import GNUTranslations, NullTranslations
-from mailman import public
 from pkg_resources import resource_stream
+from public import public
 
 
 class TestingStrategy:
diff --git a/src/mailman/testing/layers.py b/src/mailman/testing/layers.py
index 3157809e6..67fb4f5e1 100644
--- a/src/mailman/testing/layers.py
+++ b/src/mailman/testing/layers.py
@@ -32,7 +32,6 @@ import datetime
 import tempfile
 
 from lazr.config import as_boolean
-from mailman import public
 from mailman.config import config
 from mailman.core import initialize
 from mailman.core.initialize import INHIBIT_CONFIG_FILE
@@ -44,6 +43,7 @@ from mailman.testing.helpers import (
 from mailman.testing.mta import ConnectionCountingController
 from mailman.utilities.string import expand
 from pkg_resources import resource_string as resource_bytes
+from public import public
 from textwrap import dedent
 from zope.component import getUtility
 
diff --git a/src/mailman/testing/mta.py b/src/mailman/testing/mta.py
index 81e4b8a62..d94466428 100644
--- a/src/mailman/testing/mta.py
+++ b/src/mailman/testing/mta.py
@@ -24,8 +24,8 @@ import smtplib
 from aiosmtpd.controller import Controller
 from aiosmtpd.handlers import Message as MessageHandler
 from aiosmtpd.smtp import SMTP
-from mailman import public
 from mailman.interfaces.mta import IMailTransportAgentLifecycle
+from public import public
 from queue import Empty, Queue
 from zope.interface import implementer
 
diff --git a/src/mailman/testing/nose.py b/src/mailman/testing/nose.py
deleted file mode 100644
index bbd361390..000000000
--- a/src/mailman/testing/nose.py
+++ /dev/null
@@ -1,118 +0,0 @@
-# Copyright (C) 2013-2016 by the Free Software Foundation, Inc.
-#
-# This file is part of GNU Mailman.
-#
-# GNU Mailman is free software: you can redistribute it and/or modify it under
-# the terms of the GNU General Public License as published by the Free
-# Software Foundation, either version 3 of the License, or (at your option)
-# any later version.
-#
-# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-# more details.
-#
-# You should have received a copy of the GNU General Public License along with
-# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
-
-"""nose2 test infrastructure."""
-
-import os
-import re
-import doctest
-import importlib
-
-from mailman import public
-from mailman.testing.documentation import setup, teardown
-from mailman.testing.layers import ConfigLayer, MockAndMonkeyLayer, SMTPLayer
-from nose2.events import Plugin
-from pkg_resources import resource_filename
-
-
-DOT = '.'
-FLAGS = doctest.ELLIPSIS | doctest.NORMALIZE_WHITESPACE | doctest.REPORT_NDIFF
-TOPDIR = os.path.dirname(resource_filename('mailman', '__init__.py'))
-
-
-@public
-class NosePlugin(Plugin):
-    configSection = 'mailman'
-
-    def __init__(self):
-        super().__init__()
-        self.patterns = []
-        self.stderr = False
-        def set_stderr(ignore):                                  # noqa: E306
-            self.stderr = True
-        self.addArgument(self.patterns, 'P', 'pattern',
-                         'Add a test matching pattern')
-        self.addFlag(set_stderr, 'E', 'stderr',
-                     'Enable stderr logging to sub-runners')
-
-    def startTestRun(self, event):
-        MockAndMonkeyLayer.testing_mode = True
-        if (self.stderr or
-                len(os.environ.get('MM_VERBOSE_TESTLOG', '').strip()) > 0):
-            ConfigLayer.stderr = True
-
-    def getTestCaseNames(self, event):
-        if len(self.patterns) == 0:
-            # No filter patterns, so everything should be tested.
-            return
-        # Does the pattern match the fully qualified class name?
-        for pattern in self.patterns:
-            full_class_name = '{}.{}'.format(
-                event.testCase.__module__, event.testCase.__name__)
-            if re.search(pattern, full_class_name):
-                # Don't suppress this test class.
-                return
-        names = filter(event.isTestMethod, dir(event.testCase))
-        for name in names:
-            full_test_name = '{}.{}.{}'.format(
-                event.testCase.__module__,
-                event.testCase.__name__,
-                name)
-            for pattern in self.patterns:
-                if re.search(pattern, full_test_name):
-                    break
-            else:
-                event.excludedNames.append(name)
-
-    def handleFile(self, event):
-        path = event.path[len(TOPDIR)+1:]
-        if len(self.patterns) > 0:
-            for pattern in self.patterns:
-                if re.search(pattern, path):
-                    break
-            else:
-                # Skip this doctest.
-                return
-        base, ext = os.path.splitext(path)
-        if ext != '.rst':
-            return
-        # Look to see if the package defines a test layer, otherwise use the
-        # default layer.  First turn the file system path into a dotted Python
-        # module path.
-        parent = os.path.dirname(path)
-        dotted = 'mailman.' + DOT.join(parent.split(os.path.sep))
-        try:
-            module = importlib.import_module(dotted)
-        except ImportError:
-            layer = SMTPLayer
-        else:
-            layer = getattr(module, 'layer', SMTPLayer)
-        test = doctest.DocFileTest(
-            path, package='mailman',
-            optionflags=FLAGS,
-            setUp=setup,
-            tearDown=teardown)
-        test.layer = layer
-        # Suppress the extra "Doctest: ..." line.
-        test.shortDescription = lambda: None
-        event.extraTests.append(test)
-
-    # def startTest(self, event):
-    #     import sys; print('vvvvv', event.test, file=sys.stderr)
-
-    # def stopTest(self, event):
-    #     import sys; print('^^^^^', event.test, file=sys.stderr)
diff --git a/src/mailman/utilities/datetime.py b/src/mailman/utilities/datetime.py
index 9bb772b3f..2915080e8 100644
--- a/src/mailman/utilities/datetime.py
+++ b/src/mailman/utilities/datetime.py
@@ -24,8 +24,8 @@ instrumented for testing purposes.
 
 import datetime
 
-from mailman import public
 from mailman.testing import layers
+from public import public
 
 
 # Python always sets the locale to 'C' locale unless the user explicitly calls
diff --git a/src/mailman/utilities/email.py b/src/mailman/utilities/email.py
index e870117ac..546a7de61 100644
--- a/src/mailman/utilities/email.py
+++ b/src/mailman/utilities/email.py
@@ -19,7 +19,7 @@
 
 from base64 import b32encode
 from hashlib import sha1
-from mailman import public
+from public import public
 
 
 @public
diff --git a/src/mailman/utilities/filesystem.py b/src/mailman/utilities/filesystem.py
index e89f2abb8..7dcf2bb80 100644
--- a/src/mailman/utilities/filesystem.py
+++ b/src/mailman/utilities/filesystem.py
@@ -20,7 +20,7 @@
 import os
 
 from contextlib import suppress
-from mailman import public
+from public import public
 
 
 @public
diff --git a/src/mailman/utilities/i18n.py b/src/mailman/utilities/i18n.py
index 1df8ede7e..a658c231b 100644
--- a/src/mailman/utilities/i18n.py
+++ b/src/mailman/utilities/i18n.py
@@ -21,11 +21,11 @@ import os
 import sys
 
 from itertools import product
-from mailman import public
 from mailman.config import config
 from mailman.core.constants import system_preferences
 from mailman.interfaces.errors import MailmanError
 from pkg_resources import resource_filename
+from public import public
 
 
 @public
diff --git a/src/mailman/utilities/importer.py b/src/mailman/utilities/importer.py
index cf14fa73a..c8348a681 100644
--- a/src/mailman/utilities/importer.py
+++ b/src/mailman/utilities/importer.py
@@ -23,7 +23,6 @@ import sys
 import logging
 import datetime
 
-from mailman import public
 from mailman.config import config
 from mailman.handlers.decorate import decorate_template
 from mailman.interfaces.action import Action, FilterAction
@@ -44,6 +43,7 @@ from mailman.interfaces.template import ITemplateManager
 from mailman.interfaces.usermanager import IUserManager
 from mailman.utilities.filesystem import makedirs
 from mailman.utilities.i18n import search
+from public import public
 from sqlalchemy import Boolean
 from zope.component import getUtility
 
diff --git a/src/mailman/utilities/interact.py b/src/mailman/utilities/interact.py
index ac1612156..48f3ae358 100644
--- a/src/mailman/utilities/interact.py
+++ b/src/mailman/utilities/interact.py
@@ -23,7 +23,7 @@ import code
 
 from contextlib import suppress
 from inspect import signature
-from mailman import public
+from public import public
 
 
 DEFAULT_BANNER = object()
diff --git a/src/mailman/utilities/mailbox.py b/src/mailman/utilities/mailbox.py
index b799babea..19146e036 100644
--- a/src/mailman/utilities/mailbox.py
+++ b/src/mailman/utilities/mailbox.py
@@ -23,8 +23,9 @@
 # get its size.  MMDF is slightly more sane than mbox; it's primary advantage
 # for us is that it does no 'From' mangling.
 # mangling.
+
 from mailbox import MMDF
-from mailman import public
+from public import public
 
 
 @public
diff --git a/src/mailman/utilities/modules.py b/src/mailman/utilities/modules.py
index b16aa45e5..83063a3f0 100644
--- a/src/mailman/utilities/modules.py
+++ b/src/mailman/utilities/modules.py
@@ -20,8 +20,8 @@
 import os
 import sys
 
-from mailman import public
 from pkg_resources import resource_filename, resource_listdir
+from public import public
 
 
 @public
diff --git a/src/mailman/utilities/options.py b/src/mailman/utilities/options.py
index 1c0064260..9e1e698a7 100644
--- a/src/mailman/utilities/options.py
+++ b/src/mailman/utilities/options.py
@@ -21,12 +21,12 @@ import os
 import sys
 
 from copy import copy
-from mailman import public
 from mailman.config import config
 from mailman.core.i18n import _
 from mailman.core.initialize import initialize
 from mailman.version import MAILMAN_VERSION
 from optparse import Option, OptionParser, OptionValueError
+from public import public
 
 
 def check_unicode(option, opt, value):
diff --git a/src/mailman/utilities/passwords.py b/src/mailman/utilities/passwords.py
index 5597e2556..7bf18b93a 100644
--- a/src/mailman/utilities/passwords.py
+++ b/src/mailman/utilities/passwords.py
@@ -17,10 +17,10 @@
 
 """A wrapper around passlib."""
 
-from mailman import public
 from mailman.config.config import load_external
 from mailman.interfaces.configuration import ConfigurationUpdatedEvent
 from passlib.context import CryptContext
+from public import public
 
 
 class PasswordContext:
diff --git a/src/mailman/utilities/protocols.py b/src/mailman/utilities/protocols.py
index 5f447c465..43d43a8bc 100644
--- a/src/mailman/utilities/protocols.py
+++ b/src/mailman/utilities/protocols.py
@@ -19,10 +19,10 @@
 
 import requests
 
-from mailman import public
 from mailman.interfaces.languages import ILanguageManager
 from mailman.interfaces.listmanager import IListManager
 from mailman.utilities.i18n import TemplateNotFoundError, find
+from public import public
 from urllib.error import URLError
 from urllib.parse import urlparse
 from zope.component import getUtility
diff --git a/src/mailman/utilities/queries.py b/src/mailman/utilities/queries.py
index e27ae9a17..cd6542270 100644
--- a/src/mailman/utilities/queries.py
+++ b/src/mailman/utilities/queries.py
@@ -18,7 +18,7 @@
 """Some helpers for queries."""
 
 from collections.abc import Sequence
-from mailman import public
+from public import public
 
 
 @public
diff --git a/src/mailman/utilities/string.py b/src/mailman/utilities/string.py
index 2694877ee..fecadc444 100644
--- a/src/mailman/utilities/string.py
+++ b/src/mailman/utilities/string.py
@@ -21,8 +21,8 @@ import logging
 
 from email.errors import HeaderParseError
 from email.header import decode_header, make_header
-from mailman import public
 from mailman.config import config
+from public import public
 from string import Template, whitespace
 from textwrap import TextWrapper, dedent
 
diff --git a/src/mailman/utilities/tests/test_modules.py b/src/mailman/utilities/tests/test_modules.py
index 8e144e60b..d34a99910 100644
--- a/src/mailman/utilities/tests/test_modules.py
+++ b/src/mailman/utilities/tests/test_modules.py
@@ -67,7 +67,7 @@ class TestModuleImports(unittest.TestCase):
             Path(init_file).touch()
             with open(good_file, 'w', encoding='utf-8') as fp:
                 print("""\
-from mailman import public
+from public import public
 from mailman.interfaces.styles import IStyle
 from zope.interface import implementer
 
@@ -80,7 +80,7 @@ class GoodStyle:
 """, file=fp)
             with open(bad_file, 'w', encoding='utf-8') as fp:
                 print("""\
-from mailman import public
+from public import public
 from mailman.interfaces.styles import IStyle
 from zope.interface import implementer
 
diff --git a/src/mailman/utilities/uid.py b/src/mailman/utilities/uid.py
index 4389bcd92..9abf92e90 100644
--- a/src/mailman/utilities/uid.py
+++ b/src/mailman/utilities/uid.py
@@ -29,10 +29,10 @@ import hashlib
 
 from contextlib import suppress
 from flufl.lock import Lock
-from mailman import public
 from mailman.config import config
 from mailman.model.uid import UID
 from mailman.testing import layers
+from public import public
 
 
 class _PredictableIDGenerator:
diff --git a/tox.ini b/tox.ini
index 7892b557a..34bd367d1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -35,6 +35,7 @@ commands =
     python -m flake8 src
 deps =
     flake8>3.0
+    flufl.testing
 
 [testenv:docs]
 basepython = python3
@@ -51,3 +52,4 @@ rc = --rcfile={[coverage]rcfile}
 max-line-length = 79
 exclude = src/mailman/compat/*.py
 jobs = 1
+enable-extensions = U4
diff --git a/unittest.cfg b/unittest.cfg
index d639a8ae3..ba479fdf8 100644
--- a/unittest.cfg
+++ b/unittest.cfg
@@ -1,10 +1,15 @@
 [unittest]
 verbose = 2
-plugins = mailman.testing.nose
+plugins = flufl.testing.nose
           nose2.plugins.layers
 
-[mailman]
-always-on = True
-
 [log-capture]
 always-on = False
+
+[flufl.testing]
+always-on = True
+package = mailman
+start_run = mailman.testing.helpers.nose2_start_test_run_callback
+default_layer = mailman.testing.layers.SMTPLayer
+setup = mailman.testing.documentation.setup
+teardown = mailman.testing.documentation.teardown