# Copyright (C) 2008-2017 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/>.

# This is the GNU Mailman configuration schema.  It defines the default
# configuration options for the core system and plugins.  It uses ini-style
# formats under the lazr.config regime to define all system configuration
# options.  See <https://launchpad.net/lazr.config> for details.


[mailman]
# This address is the "site owner" address.  Certain messages which must be
# delivered to a human, but which can't be delivered to a list owner (e.g. a
# bounce from a list owner), will be sent to this address.  It should point to
# a human.
site_owner: changeme@example.com

# This is the local-part of an email address used in the From field whenever a
# message comes from some entity to which there is no natural reply recipient.
# Mailman will append '@' and the host name of the list involved.  This
# address must not bounce and it must not point to a Mailman process.
noreply_address: noreply

# The default language for this server.
default_language: en

# Membership tests for posting purposes are usually performed by looking at a
# set of headers, passing the test if any of their values match a member of
# the list.  Headers are checked in the order given in this variable.  The
# value From_ means to use the envelope sender.  Field names are case
# insensitive.  This is a space separate list of headers.
sender_headers: from from_ reply-to sender

# Mail command processor will ignore mail command lines after designated max.
email_commands_max_lines: 10

# Default length of time a pending request is live before it is evicted from
# the pending database.
pending_request_life: 3d

# How long should files be saved before they are evicted from the cache?
cache_life: 7d

# A callable to run with no arguments early in the initialization process.
# This runs before database initialization.
pre_hook:

# A callable to run with no arguments late in the initialization process.
# This runs after adapters are initialized.
post_hook:

# Which paths.* file system layout to use.
layout: here

# Can MIME filtered messages be preserved by list owners?
filtered_messages_are_preservable: no

# How should text/html parts be converted to text/plain when the mailing list
# is set to convert HTML to plaintext?  This names a command to be called,
# where the substitution variable $filename is filled in by Mailman, and
# contains the path to the temporary file that the command should read from.
# The command should print the converted text to stdout.
html_to_plain_text_command: /usr/bin/lynx -dump $filename

# Specify what characters are allowed in list names.  Characters outside of
# the class [-_.+=!$*{}~0-9a-z] matched case insensitively are never allowed,
# but this specifies a subset as the only allowable characters.  This must be
# a valid character class regexp or the effect on list creation is
# unpredictable.
listname_chars: [-_.0-9a-z]


[shell]
# `mailman shell` (also `withlist`) gives you an interactive prompt that you
# can use to interact with an initialized and configured Mailman system.  Use
# --help for more information.  This section allows you to configure certain
# aspects of this interactive shell.

# Customize the interpreter prompt.
prompt: >>>

# Banner to show on startup.
banner: Welcome to the GNU Mailman shell

# Use IPython as the shell, which must be found on the system.  Valid values
# are `no`, `yes`, and `debug` where the latter is equivalent to `yes` except
# that any import errors will be displayed to stderr.
use_ipython: no

# Set this to allow for command line history if readline is available.  This
# can be as simple as $var_dir/history.py to put the file in the var directory.
history_file:


[paths.master]
# Important directories for Mailman operation.  These are defined here so that
# different layouts can be supported.   For example, a developer layout would
# be different from a FHS layout.  Most paths are based off the var_dir, and
# often just setting that will do the right thing for all the other paths.
# You might also have to set spool_dir though.
#
# Substitutions are allowed, but must be of the form $var where 'var' names a
# configuration variable in the paths.* section.  Substitutions are expanded
# recursively until no more $-variables are present.  Beware of infinite
# expansion loops!
#
# This is the root of the directory structure that Mailman will use to store
# its run-time data.
var_dir: /var/tmp/mailman
# This is where the Mailman queue files directories will be created.
queue_dir: $var_dir/queue
# This is the directory containing the Mailman 'runner' and 'master' commands
# if set to the string '$argv', it will be taken as the directory containing
# the 'mailman' command.
bin_dir: $argv
# All list-specific data.
list_data_dir: $var_dir/lists
# Directory where log files go.
log_dir: $var_dir/logs
# Directory for system-wide locks.
lock_dir: $var_dir/locks
# Directory for system-wide data.
data_dir: $var_dir/data
# Cache files.
cache_dir: $var_dir/cache
# Directory for configuration files and such.
etc_dir: $var_dir/etc
# Directory containing Mailman plugins.
ext_dir: $var_dir/ext
# Directory where the default IMessageStore puts its messages.
messages_dir: $var_dir/messages
# Directory for archive backends to store their messages in.  Archivers should
# create a subdirectory in here to store their files.
archive_dir: $var_dir/archives
# Root directory for site-specific template override files.
template_dir: $var_dir/templates
# There are also a number of paths to specific file locations that can be
# defined.  For these, the directory containing the file must already exist,
# or be one of the directories created by Mailman as per above.
#
# This is where PID file for the master runner is stored.
pid_file: $var_dir/master.pid
# Lock file.
lock_file: $lock_dir/master.lck


[devmode]
# Setting enabled to true enables certain safeguards and other behavior
# changes that make developing Mailman easier.  For example, it forces the
# SMTP RCPT TO recipients to be a test address so that no messages are
# accidentally sent to real addresses.
enabled: no

# Set this to an address to force the SMTP RCPT TO recipents when devmode is
# enabled.  This way messages can't be accidentally sent to real addresses.
recipient:

# This gets set by the testing layers so that the runner subprocesses produce
# predictable dates and times.
testing: no

# Time-outs for starting up various test subprocesses, such as the LMTP and
# REST servers.  This is only used for the test suite, so if you're seeing
# test failures, try increasing the wait time.
wait: 60s


[passwords]
# Where can we find the passlib configuration file?  The path can be either a
# file system path or a Python import path.  If the value starts with python:
# then it is a Python import path, otherwise it is a file system path.  File
# system paths must be absolute since no guarantees are made about the current
# working directory.  Python paths should not include the trailing .cfg, which
# the file must end with.
configuration: python:mailman.config.passlib

# When Mailman generates them, this is the default length of passwords.
password_length: 8


[runner.master]
# Define which runners, and how many of them, to start.

# The full import path to the class for this runner.
class: mailman.core.runner.Runner

# The queue directory path that this runner scans.  This is ignored for
# runners that don't manage a queue directory.
path: $QUEUE_DIR/$name

# The number of parallel runners.  This must be a power of 2.  This is ignored
# for runners that don't manage a queue directory.
instances: 1

# Whether to start this runner or not.
start: yes

# The maximum number of restarts for this runner.  When the runner exits
# because of an error or other unexpected problem, it is automatically
# restarted, until the maximum number of restarts has been reached.
max_restarts: 10

# The sleep interval for the runner.  It wakes up once every interval to
# process the files in its slice of the queue directory.  Some runners may
# ignore this.
sleep_time: 1s


[database]
# The class implementing the IDatabase.
class: mailman.database.sqlite.SQLiteDatabase

# Use this to set the Storm database engine URL.  You generally have one
# primary database connection for all of Mailman.  List data and most rosters
# will store their data in this database, although external rosters may access
# other databases in their own way.  This string supports standard
# 'configuration' substitutions.
url: sqlite:///$DATA_DIR/mailman.db
debug: no


[logging.template]
# This defines various log settings.  The options available are:
#
# - level     -- Overrides the default level; this may be any of the
#                standard Python logging levels, case insensitive.
# - format    -- Overrides the default format string
# - datefmt   -- Overrides the default date format string
# - path      -- Overrides the default logger path.  This may be a relative
#                path name, in which case it is relative to Mailman's LOG_DIR,
#                or it may be an absolute path name.  You cannot change the
#                handler class that will be used.
# - propagate -- Boolean specifying whether to propagate log message from this
#                logger to the root "mailman" logger.  You cannot override
#                settings for the root logger.
#
# In this section, you can define defaults for all loggers, which will be
# prefixed by 'mailman.'.  Use subsections to override settings for specific
# loggers.  The names of the available loggers are:
#
# - archiver        --  All archiver output
# - bounce          --  All bounce processing logs go here
# - config          --  Configuration issues
# - database        --  Database logging (SQLAlchemy and Alembic)
# - debug           --  Only used for development
# - error           --  All exceptions go to this log
# - fromusenet      --  Information related to the Usenet to Mailman gateway
# - http            --  Internal wsgi-based web interface
# - locks           --  Lock state changes
# - mischief        --  Various types of hostile activity
# - runner          --  Runner process start/stops
# - smtp            --  Successful SMTP activity
# - smtp-failure    --  Unsuccessful SMTP activity
# - subscribe       --  Information about leaves/joins
# - vette           --  Message vetting information
format: %(asctime)s (%(process)d) %(message)s
datefmt: %b %d %H:%M:%S %Y
propagate: no
level: info
path: mailman.log

[logging.root]

[logging.archiver]

[logging.bounce]
path: bounce.log

[logging.config]

[logging.database]
level: warn

[logging.debug]
path: debug.log
level: info

[logging.error]

[logging.fromusenet]

[logging.http]

[logging.locks]

[logging.mischief]

[logging.runner]

[logging.smtp]
path: smtp.log

# The smtp logger defines additional options for handling the logging of each
# attempted delivery.  These format strings specify what information is logged
# for every message, every successful delivery, every refused delivery and
# every recipient failure.  To disable a status message, set the value to 'no'
# (without the quotes).
#
# These template strings accept the following set of substitution
# placeholders, if available.
#
# msgid     -- the Message-ID of the message in question
# listname  -- the fully-qualified list name
# sender    -- the sender if available
# recip     -- the recipient address if available, or the number of
#              recipients being delivered to
# size      -- the approximate size of the message in bytes
# seconds   -- the number of seconds the operation took
# refused   -- the number of refused recipients
# smtpcode  -- the SMTP success or failure code
# smtpmsg   -- the SMTP success or failure message

every: $msgid smtp to $listname for $recip recips, completed in $time seconds
success: $msgid post to $listname from $sender, $size bytes
refused: $msgid post to $listname from $sender, $size bytes, $refused failures
failure: $msgid delivery to $recip failed with code $smtpcode, $smtpmsg

[logging.subscribe]

[logging.vette]


[webservice]
# The hostname at which admin web service resources are exposed.
hostname: localhost

# The port at which the admin web service resources are exposed.
port: 8001

# Whether or not requests to the web service are secured through SSL.
use_https: no

# Whether or not to show tracebacks in an HTTP response for a request that
# raised an exception.
show_tracebacks: yes

# The API version number for the current (highest) API.
api_version: 3.1

# The administrative username.
admin_user: restadmin

# The administrative password.
admin_pass: restpass


[language.master]
# Template for language definitions.  The section name must be [language.xx]
# where xx is the 2-character ISO code for the language.

# The English name for the language.
description: English (USA)
# And the default character set for the language.
charset: us-ascii
# Whether the language is enabled or not.
enabled: yes

# Language charsets as imported from Mailman 2.1 defaults
# Ref: http://www.lingoes.net/en/translator/langcode.htm
[language.ar]
description: Arabic
charset: utf-8
enabled: yes

[language.ast]
description: Asturian
charset: iso-8859-1
enabled: yes

[language.ca]
description: Catalan
charset: utf-8
enabled: yes

[language.cs]
description: Czech
charset: iso-8859-2
enabled: yes

[language.da]
description: Danish
charset: iso-8859-1
enabled: yes

[language.de]
description: German
charset: iso-8859-1
enabled: yes

[language.el]
description: Greek
charset: iso-8859-7
enabled: yes

[language.es]
description: Spanish
charset: iso-8859-1
enabled: yes

[language.et]
description: Estonian
charset: iso-8859-15
enabled: yes

[language.eu]
# Basque
description: Euskara
charset: iso-8859-15
enabled: yes

[language.fi]
description: Finnish
charset: iso-8859-1
enabled: yes

[language.fr]
description: French
charset: iso-8859-1
enabled: yes

[language.gl]
description: Galician
charset: utf-8
enabled: yes

[language.he]
description: Hebrew
charset: utf-8
enabled: yes

[language.hr]
description: Croatian
charset: iso-8859-2
enabled: yes

[language.hu]
description: Hungarian
charset: iso-8859-2
enabled: yes

[language.ia]
description: Interlingua
charset: iso-8859-15
enabled: yes

[language.it]
description: Italian
charset: iso-8859-1
enabled: yes

[language.ja]
description: Japanese
charset: euc-jp
enabled: yes

[language.ko]
description: Korean
charset: euc-kr
enabled: yes

[language.lt]
description: Lithuanian
charset: iso-8859-13
enabled: yes

[language.nl]
description: Dutch
charset: iso-8859-1
enabled: yes

[language.no]
description: Norwegian
charset: iso-8859-1
enabled: yes

[language.pl]
description: Polish
charset: iso-8859-2
enabled: yes

[language.pt]
description: Protuguese
charset: iso-8859-1
enabled: yes

[language.pt_BR]
description: Protuguese (Brazil)
charset: iso-8859-1
enabled: yes

[language.ro]
description: Romanian
charset: iso-8859-2
enabled: yes

[language.ru]
description: Russian
charset: koi8-r
enabled: yes

[language.sk]
description: Slovak
charset: utf-8
enabled: yes

[language.sl]
description: Slovenian
charset: iso-8859-2
enabled: yes

[language.sr]
description: Serbian
charset: utf-8
enabled: yes

[language.sv]
description: Swedish
charset: iso-8859-1
enabled: yes

[language.tr]
description: Turkish
charset: iso-8859-9
enabled: yes

[language.uk]
description: Ukrainian
charset: utf-8
enabled: yes

[language.vi]
description: Vietnamese
charset: utf-8
enabled: yes

[language.zh_CN]
description: Chinese
charset: utf-8
enabled: yes

[language.zh_TW]
description: Chinese (Taiwan)
charset: utf-8
enabled: yes


[antispam]
# This section defines basic antispam detection settings.

# This value contains lines which specify RFC 822 headers in the email to
# check for spamminess.  Each line contains a `key: value` pair, where the key
# is the header to check and the value is a Python regular expression to match
# against the header's value.  Multiple checks should be entered as multiline
# value with leading spaces:
#
# header_checks:
#   X-Spam: (yes|maybe)
#   Authentication-Results: mail.example.com; dmarc=(fail|quarantine)
#
# The header value and regular expression are always matched
# case-insensitively.
header_checks:

# The chain to jump to if any of the header patterns matches.  This must be
# the name of an existing chain such as 'discard', 'reject', 'hold', or
# 'accept', otherwise 'hold' will be used.
jump_chain: hold


[mta]
# The class defining the interface to the incoming mail transport agent.
incoming: mailman.mta.postfix.LMTP

# The callable implementing delivery to the outgoing mail transport agent.
# This must accept three arguments, the mailing list, the message, and the
# message metadata dictionary.
outgoing: mailman.mta.deliver.deliver

# How to connect to the outgoing MTA.  If smtp_user and smtp_pass is given,
# then Mailman will attempt to log into the MTA when making a new connection.
smtp_host: localhost
smtp_port: 25
smtp_user:
smtp_pass:

# Where the LMTP server listens for connections.  Use 127.0.0.1 instead of
# localhost for Postfix integration, because Postfix only consults DNS
# (e.g. not /etc/hosts).
lmtp_host: 127.0.0.1
lmtp_port: 8024

# Ceiling on the number of recipients that can be specified in a single SMTP
# transaction.  Set to 0 to submit the entire recipient list in one
# transaction.
max_recipients: 500

# Ceiling on the number of SMTP sessions to perform on a single socket
# connection.  Some MTAs have limits.  Set this to 0 to do as many as we like
# (i.e. your MTA has no limits).  Set this to some number great than 0 and
# Mailman will close the SMTP connection and re-open it after this number of
# consecutive sessions.
max_sessions_per_connection: 0

# Maximum number of simultaneous subthreads that will be used for SMTP
# delivery.  After the recipients list is chunked according to max_recipients,
# each chunk is handed off to the SMTP server by a separate such thread.  If
# your Python interpreter was not built for threads, this feature is disabled.
# You can explicitly disable it in all cases by setting max_delivery_threads
# to 0.
max_delivery_threads: 0

# How long should messages which have delivery failures continue to be
# retried?  After this period of time, a message that has failed recipients
# will be dequeued and those recipients will never receive the message.
delivery_retry_period: 5d

# These variables control the format and frequency of VERP-like delivery for
# better bounce detection.  VERP is Variable Envelope Return Path, defined
# here:
#
# http://cr.yp.to/proto/verp.txt
#
# This involves encoding the address of the recipient as Mailman knows it into
# the envelope sender address (i.e. RFC 5321 MAIL FROM).  Thus, no matter what
# kind of forwarding the recipient has in place, should it eventually bounce,
# we will receive an unambiguous notice of the bouncing address.
#
# However, we're technically only "VERP-like" because we're doing the envelope
# sender encoding in Mailman, not in the MTA.  We do require cooperation from
# the MTA, so you must be sure your MTA can be configured for extended address
# semantics.
#
# The first variable describes how to encode VERP envelopes.  It must contain
# these three string interpolations, which get filled in by Mailman:
#
# $bounces -- the list's -bounces robot address will be set here
# $local   -- the recipient address's local mailbox part will be set here
# $domain  -- the recipient address's domain name will be set here
#
# This example uses the default below.
#
# FQDN list address is: mylist@dom.ain
# Recipient is:         aperson@a.nother.dom
#
# The envelope sender will be mylist-bounces+aperson=a.nother.dom@dom.ain
#
# Note that your MTA /must/ be configured to deliver such an addressed message
# to mylist-bounces!
verp_delimiter: +
verp_format: ${bounces}+${local}=${domain}

# For nicer confirmation emails, use a VERP-like format which encodes the
# confirmation cookie in the reply address.  This lets us put a more user
# friendly Subject: on the message, but requires cooperation from the MTA.
# Format is like verp_format, but with the following substitutions:
#
# $address  -- the list-confirm address
# $cookie   -- the confirmation cookie
verp_confirm_format: $address+$cookie

# This regular expression unambiguously decodes VERP addresses, which will be
# placed in the To: (or other, depending on the MTA) header of the bounce
# message by the bouncing MTA.  Getting this right is critical -- and tricky.
# Learn your Python regular expressions.  It must define exactly three named
# groups, `bounces`, `local` and `domain`, with the same definition as above.
# It will be compiled case-insensitively.
verp_regexp: ^(?P<bounces>[^+]+?)\+(?P<local>[^=]+)=(?P<domain>[^@]+)@.*$

# This is analogous to verp_regexp, but for splitting apart the
# verp_confirm_format.  MUAs have been observed that mung
#
# From: local_part@host
#
# into
#
# To: "local_part" <local_part@host>
#
# when replying, so we skip everything up to '<' if any.
verp_confirm_regexp: ^(.*<)?(?P<addr>[^+]+?)\+(?P<cookie>[^@]+)@.*$

# Set this to 'yes' to enable VERP-like (more user friendly) confirmations.
verp_confirmations: no

# Another good opportunity is when regular delivery is personalized.  Here
# again, we're already incurring the performance hit for addressing each
# individual recipient.  Set this to 'yes' to enable VERPs on all personalized
# regular deliveries (personalized digests aren't supported yet).
verp_personalized_deliveries: no

# And finally, we can VERP normal, non-personalized deliveries.  However,
# because it can be a significant performance hit, we allow you to decide how
# often to VERP regular deliveries.  This is the interval, in number of
# messages, to do a VERP recipient address.  The same variable controls both
# regular and digest deliveries.  Set to 0 to disable occasional VERPs, set to
# 1 to VERP every delivery, or to some number > 1 for only occasional VERPs.
verp_delivery_interval: 0

# VERP format and regexp for probe messages.
verp_probe_format: $bounces+$token@$domain
verp_probe_regexp: ^(?P<bounces>[^+]+?)\+(?P<token>[^@]+)@.*$
# Set this 'yes' to activate VERP probe for disabling by bounce.
verp_probes: no

# This is the maximum number of automatic responses sent to an address because
# of -request messages or posting hold messages.  This limit prevents response
# loops between Mailman and misconfigured remote email robots.  Mailman
# already inhibits automatic replies to any message labeled with a header
# "Precendence: bulk|list|junk".  This is a fallback safety valve so it should
# be set fairly high.  Set to 0 for no limit (probably useful only for
# debugging).
max_autoresponses_per_day: 10

# Some list posts and mail to the -owner address may contain DomainKey or
# DomainKeys Identified Mail (DKIM) signature headers <http://www.dkim.org/>.
# Various list transformations to the message such as adding a list header or
# footer or scrubbing attachments or even reply-to munging can break these
# signatures.  It is generally felt that these signatures have value, even if
# broken and even if the outgoing message is resigned.  However, some sites
# may wish to remove these headers by setting this to 'yes'.
remove_dkim_headers: no

# Where can we find the mail server specific configuration file?  The path can
# be either a file system path or a Python import path.  If the value starts
# with python: then it is a Python import path, otherwise it is a file system
# path.  File system paths must be absolute since no guarantees are made about
# the current working directory.  Python paths should not include the trailing
# .cfg, which the file must end with.
configuration: python:mailman.config.postfix


[bounces]
# How often should the bounce runner process queued detected bounces?
register_bounces_every: 15m


[archiver.master]
# To add new archivers, define a new section based on this one, overriding the
# following values.

# The class implementing the IArchiver interface.
class:

# Set this to 'yes' to enable the archiver.
enable: no

# Additional configuration for the archiver.  The path can be either a file
# system path or a Python import path.  If the value starts with python: then
# it is a Python import path, otherwise it is a file system path.  File system
# paths must be absolute since no guarantees are made about the current
# working directory.  Python paths should not include the trailing .cfg, which
# the file must end with.
configuration: changeme

# When sending the message to the archiver, you have the option of
# "clobbering" the Date: header, specifically to make it more sane.  Some
# archivers can't handle dates that are wildly off from reality.  This does
# not change the Date: header for any other delivery vector except this
# specific archive.
#
# When the original Date header is clobbered, it will always be stored in
# X-Original-Date.  The new Date header will always be set to the date at
# which the messages was received by the Mailman server, in UTC.
#
# Your options here are:
# * never  -- Leaves the original Date header alone.
# * always -- Always override the Date header.
# * maybe  -- Override the Date only if it is outside the clobber_skew period.
clobber_date: maybe
clobber_skew: 1d

[archiver.mhonarc]
# This is the stock MHonArc archiver.
class: mailman.archiving.mhonarc.MHonArc
configuration: python:mailman.config.mhonarc

[archiver.mail_archive]
# This is the stock mail-archive.com archiver.
class: mailman.archiving.mailarchive.MailArchive
configuration: python:mailman.config.mail_archive

[archiver.prototype]
# This is a prototypical sample archiver.
class: mailman.archiving.prototype.Prototype


[styles]
# Python import paths inside which components are searched for which implement
# the IStyle interface.  Use one path per line.
paths:
    mailman.styles

# The default style to apply if nothing else was requested.  The value is the
# name of an existing style.  If no such style exists, no style will be
# applied.
default: legacy-default


[digests]
# Headers which should be kept in both RFC 1153 (plain) and MIME digests.  RFC
# 1153 also specifies these headers in this exact order, so order matters.
# These are space separated and case insensitive.
mime_digest_keep_headers:
    Date From To Cc Subject Message-ID Keywords
    In-Reply-To References Content-Type MIME-Version
    Content-Transfer-Encoding Precedence Reply-To
    Message List-Post

plain_digest_keep_headers:
    Message Date From
    Subject To Cc
    Message-ID Keywords
    Content-Type


[nntp]
# Set these variables if you need to authenticate to your NNTP server for
# Usenet posting or reading.  Leave these blank if no authentication is
# necessary.
user:
password:

# Host and port of the NNTP server to connect to.  Leave these blank to use
# the default localhost:119.
host:
port:

# This controls how headers must be cleansed in order to be accepted by your
# NNTP server.  Some servers like INN reject messages containing prohibited
# headers, or duplicate headers.  The NNTP server may reject the message for
# other reasons, but there's little that can be programmatically done about
# that.
#
# These headers (case ignored) are removed from the original message.  This is
# a whitespace separate list of headers.
remove_headers:
    nntp-posting-host nntp-posting-date x-trace
    x-complaints-to xref date-received posted
    posting-version relay-version received

# These headers are left alone, unless there are duplicates in the original
# message.  Any second and subsequent headers are rewritten to the second
# named header (case preserved).  This is a list of header pairs, one pair per
# line.
rewrite_duplicate_headers:
    To X-Original-To
    CC X-Original-CC
    Content-Transfer-Encoding X-Original-Content-Transfer-Encoding
    MIME-Version X-MIME-Version


[dmarc]
# RFC 7489 - Domain-based Message Authentication, Reporting, and Conformance.
# https://en.wikipedia.org/wiki/DMARC

# Parameters for DMARC DNS lookups.  If you are seeing 'DNSException: Unable
# to query DMARC policy ...' entries in your error log, you may need to adjust
# these.
#
# The time to wait for a response from a name server before timeout.
resolver_timeout: 3s
# The total time to spend trying to get an answer to the DNS question.
resolver_lifetime: 5s

# A URL from which to retrieve the data for the algorithm that computes
# Organizational Domains for DMARC policy lookup purposes.  This can be
# anything handled by the Python urllib.request.urlopen function.  See
# https://publicsuffix.org/list/ for info.
org_domain_data_url: https://publicsuffix.org/list/public_suffix_list.dat

# How long should the local suffix list be used before it's considered out of
# date.  After this amount of time a new list will be downloaded, but if it
# can't be accessed, old data will still be used.
cache_lifetime: 7d