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# Copyright (C) 1998,1999,2000,2001 by the Free Software Foundation, Inc.
#
# This program 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 2
# of the License, or (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""Handle delivery bounces.
"""
import sys
import time
from email.MIMEText import MIMEText
from email.MIMEMessage import MIMEMessage
from Mailman import mm_cfg
from Mailman import Utils
from Mailman import Message
from Mailman import MemberAdaptor
from Mailman import Pending
from Mailman.Logging.Syslog import syslog
from Mailman.i18n import _
EMPTYSTRING = ''
class _BounceInfo:
def __init__(self, member, score, date, noticesleft, cookie):
self.member = member
self.score = score
self.date = date
self.noticesleft = noticesleft
self.lastnotice = None
self.cookie = cookie
def __repr__(self):
# For debugging
return """\
<bounce info for member %(member)s
current score: %(score)s
last bounce date: %(date)s
email notices left: %(noticesleft)s
last notice date: %(lastnotice)s
confirmation cookie: %(cookie)s
>""" % self.__dict__
class Bouncer:
def InitVars(self):
# Configurable...
self.bounce_processing = mm_cfg.DEFAULT_BOUNCE_PROCESSING
self.bounce_score_threshold = mm_cfg.DEFAULT_BOUNCE_SCORE_THRESHOLD
self.bounce_info_stale_after = mm_cfg.DEFAULT_BOUNCE_INFO_STALE_AFTER
self.bounce_you_are_disabled_warnings = \
mm_cfg.DEFAULT_BOUNCE_YOU_ARE_DISABLED_WARNINGS
self.bounce_you_are_disabled_warnings_interval = \
mm_cfg.DEFAULT_BOUNCE_YOU_ARE_DISABLED_WARNINGS_INTERVAL
# Not configurable...
#
# This holds legacy member related information. It's keyed by the
# member address, and the value is an object containing the bounce
# score, the date of the last received bounce, and a count of the
# notifications left to send.
self.bounce_info = {}
# New style delivery status
self.delivery_status = {}
def registerBounce(self, member, msg, weight=1.0):
if not self.isMember(member):
return
info = self.getBounceInfo(member)
today = time.localtime()[:3]
if info is None:
# This is the first bounce we've seen from this member
cookie = Pending.new(Pending.RE_ENABLE, self.internal_name(),
member)
info = _BounceInfo(member, weight, today,
self.bounce_you_are_disabled_warnings,
cookie)
self.setBounceInfo(member, info)
syslog('bounce', '%s: %s bounce score: %s', self.internal_name(),
member, info.score)
elif self.getDeliveryStatus(member) <> MemberAdaptor.ENABLED:
# The user is already disabled, so we can just ignore subsequent
# bounces. These are likely due to residual messages that were
# sent before disabling the member, but took a while to bounce.
syslog('bounce', '%s: %s residual bounce received',
self.internal_name(), member)
elif info.date == today:
# We've already scored any bounces for today, so ignore this one.
syslog('bounce', '%s: %s already scored a bounce for today',
self.internal_name(), member)
else:
# See if this member's bounce information is stale.
now = time.mktime(today + (0,) * 6)
lastbounce = time.mktime(info.date + (0,) * 6)
if lastbounce + self.bounce_info_stale_after < now:
# Information is stale, so simply reset it
info.score = weight
info.date = today
info.noticesleft = 0
info.lastnotice = None
# BAW: The following isn't strictly necessary
self.setBounceInfo(member, info)
syslog('bounce', '%s: %s has stale bounce info, resetting',
self.internal_name(), member)
else:
# Nope, the information isn't stale, so add to the bounce
# score and take any necessary action.
info.score += weight
info.date = today
# BAW: The following isn't strictly necessary
self.setBounceInfo(member, info)
syslog('bounce', '%s: %s current bounce score: %s',
member, self.internal_name(), info.score)
if info.score >= self.bounce_score_threshold:
# Disable them
syslog('bounce',
'%s: %s disabling due to bounce score %s >= %s',
self.internal_name(), member,
info.score, self.bounce_score_threshold)
self.setDeliveryStatus(member, MemberAdaptor.BYBOUNCE)
self.sendNextNotification(member)
self.__sendAdminBounceNotice(member, msg)
def __sendAdminBounceNotice(self, member, msg):
# BAW: This is a bit kludgey, but we're not providing as much
# information in the new admin bounce notices as we used to (some of
# it was of dubious value). However, we'll provide empty, strange, or
# meaningless strings for the unused %()s fields so that the language
# translators don't have to provide new templates.
siteowner = Utils.get_site_email(self.host_name)
text = Utils.maketext(
'bounce.txt',
{'listname' : self.real_name,
'addr' : member,
'negative' : '',
'did' : _('disabled'),
'but' : '',
'reenable' : '',
'owneraddr': siteowner,
}, mlist=self)
subject = _('Bounce action notification')
umsg = Message.UserNotification(self.GetOwnerEmail(),
siteowner, subject)
umsg.attach(MIMEText(text))
umsg.attach(MIMEMessage(msg))
umsg['Content-Type'] = 'multipart/mixed'
umsg['MIME-Version'] = '1.0'
umsg.send(self)
def sendNextNotification(self, member):
info = self.getBounceInfo(member)
if info is None:
return
if info.noticesleft <= 0:
# BAW: Remove them now, with a notification message
self.ApprovedDeleteMember(member, 'bouncing address',
admin_notif=1, userack=1)
self.setBounceInfo(member, None)
# Expunge the pending cookie for the user. We throw away the
# returned data.
Pending.confirm(info.cookie)
syslog('bounce', '%s: %s deleted after exhausting notices',
self.internal_name(), member)
return
# Send the next notification
confirmurl = '%s/%s' % (self.GetScriptURL('confirm', absolute=1),
info.cookie)
optionsurl = self.GetOptionsURL(member, absolute=1)
subject = 'confirm ' + info.cookie
requestaddr = self.GetRequestEmail()
text = Utils.maketext(
'disabled.txt',
{'listname' : self.real_name,
'noticesleft': info.noticesleft,
'confirmurl' : confirmurl,
'optionsurl' : optionsurl,
'password' : self.getMemberPassword(member),
'owneraddr' : self.GetOwnerEmail(),
}, lang=self.getMemberLanguage(member), mlist=self)
msg = Message.UserNotification(member, requestaddr, subject, text)
msg.send(self)
info.noticesleft -= 1
info.lastnotice = time.localtime()[:3]
def BounceMessage(self, msg, msgdata, e=None):
# Bounce a message back to the sender, with an error message if
# provided in the exception argument.
sender = msg.get_sender()
subject = msg.get('subject', _('(no subject)'))
if e is None:
notice = _('[No bounce details are available]')
else:
notice = _(e.notice())
# Currently we always craft bounces as MIME messages.
bmsg = Message.UserNotification(msg.get_sender(),
self.GetOwnerEmail(),
subject)
bmsg['Content-Type'] = 'multipart/mixed'
bmsg['MIME-Version'] = '1.0'
txt = MIMEText(notice,
_charset=Utils.GetCharSet(self.preferred_language))
bmsg.add_payload(txt)
bmsg.add_payload(MIMEMessage(msg))
bmsg.send(self)
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