1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
# Copyright (C) 2000-2011 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/>.
"""Outgoing queue runner."""
import socket
import logging
from datetime import datetime
from lazr.config import as_boolean, as_timedelta
from mailman.config import config
from mailman.interfaces.mailinglist import Personalization
from mailman.interfaces.mta import SomeRecipientsFailed
from mailman.queue import Runner
from mailman.queue.bounce import BounceMixin
from mailman.utilities.modules import find_name
# This controls how often _do_periodic() will try to deal with deferred
# permanent failures. It is a count of calls to _do_periodic()
DEAL_WITH_PERMFAILURES_EVERY = 10
log = logging.getLogger('mailman.error')
class OutgoingRunner(Runner, BounceMixin):
"""The outgoing queue runner."""
def __init__(self, slice=None, numslices=1):
Runner.__init__(self, slice, numslices)
BounceMixin.__init__(self)
# We look this function up only at startup time.
self._func = find_name(config.mta.outgoing)
# This prevents smtp server connection problems from filling up the
# error log. It gets reset if the message was successfully sent, and
# set if there was a socket.error.
self._logged = False
self._retryq = config.switchboards['retry']
def _dispose(self, mlist, msg, msgdata):
# See if we should retry delivery of this message again.
deliver_after = msgdata.get('deliver_after', datetime.fromtimestamp(0))
if datetime.now() < deliver_after:
return True
# Calculate whether we should VERP this message or not. The results of
# this set the 'verp' key in the message metadata.
interval = int(config.mta.verp_delivery_interval)
if 'verp' in msgdata:
# Honor existing settings.
pass
# If personalization is enabled for this list and we've configured
# Mailman to always VERP personalized deliveries, then yes we VERP it.
# Also, if personalization is /not/ enabled, but
# verp_delivery_interval is set (and we've hit this interval), then
# again, this message should be VERP'd. Otherwise, no.
elif mlist.personalize <> Personalization.none:
if as_boolean(config.mta.verp_personalized_deliveries):
msgdata['verp'] = True
elif interval == 0:
# Never VERP.
msgdata['verp'] = False
elif interval == 1:
# VERP every time.
msgdata['verp'] = True
else:
# VERP every 'interval' number of times.
msgdata['verp'] = (mlist.post_id % interval == 0)
try:
self._func(mlist, msg, msgdata)
self._logged = False
except socket.error:
# There was a problem connecting to the SMTP server. Log this
# once, but crank up our sleep time so we don't fill the error
# log.
port = int(config.mta.port)
if port == 0:
port = 'smtp'
# Log this just once.
if not self._logged:
log.error('Cannot connect to SMTP server %s on port %s',
config.mta.host, port)
self._logged = True
return True
except SomeRecipientsFailed as error:
# Handle local rejects of probe messages differently.
if msgdata.get('probe_token') and error.permanent_failures:
self._probe_bounce(mlist, msgdata['probe_token'])
else:
# Delivery failed at SMTP time for some or all of the
# recipients. Permanent failures are registered as bounces,
# but temporary failures are retried for later.
#
# BAW: msg is going to be the original message that failed
# delivery, not a bounce message. This may be confusing if
# this is what's sent to the user in the probe message. Maybe
# we should craft a bounce-like message containing information
# about the permanent SMTP failure?
if error.permanent_failures:
self._queue_bounces(
mlist.fqdn_listname, error.permanent_failures, msg)
# Move temporary failures to the qfiles/retry queue which will
# occasionally move them back here for another shot at
# delivery.
if error.temporary_failures:
now = datetime.now()
recips = error.temporary_failures
last_recip_count = msgdata.get('last_recip_count', 0)
deliver_until = msgdata.get('deliver_until', now)
if len(recips) == last_recip_count:
# We didn't make any progress, so don't attempt
# delivery any longer. BAW: is this the best
# disposition?
if now > deliver_until:
return False
else:
# Keep trying to delivery this message for a while
deliver_until = now + as_timedelta(
config.mta.delivery_retry_period)
msgdata['last_recip_count'] = len(recips)
msgdata['deliver_until'] = deliver_until
msgdata['recipients'] = recips
self._retryq.enqueue(msg, msgdata)
# We've successfully completed handling of this message
return False
_do_periodic = BounceMixin._do_periodic
def _clean_up(self):
BounceMixin._clean_up(self)
Runner._clean_up(self)
|
