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diff --git a/src/mailman/bouncers/qmail.py b/src/mailman/bouncers/qmail.py
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--- a/src/mailman/bouncers/qmail.py
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-# Copyright (C) 1998-2011 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/>.
-
-"""Parse bounce messages generated by qmail.
-
-Qmail actually has a standard, called QSBMF (qmail-send bounce message
-format), as described in
-
- http://cr.yp.to/proto/qsbmf.txt
-
-This module should be conformant.
-
-"""
-
-from __future__ import absolute_import, unicode_literals
-
-__metaclass__ = type
-__all__ = [
- 'Qmail',
- ]
-
-
-import re
-
-from email.iterators import body_line_iterator
-from flufl.enum import Enum
-from zope.interface import implements
-
-from mailman.interfaces.bounce import IBounceDetector
-
-
-# Other (non-standard?) intros have been observed in the wild.
-introtags = [
- "We're sorry. There's a problem",
- 'Check your send e-mail address.',
- 'Hi. The MTA program at',
- 'Hi. This is the',
- 'This is the mail delivery agent at',
- 'Unfortunately, your mail was not delivered',
- ]
-acre = re.compile(r'<(?P<addr>[^>]*)>:')
-
-
-class ParseState(Enum):
- start = 0
- intro_paragraph_seen = 1
- recip_paragraph_seen = 2
-
-
-
-class Qmail:
- """Parse QSBMF format bounces."""
-
- implements(IBounceDetector)
-
- def process(self, msg):
- """See `IBounceDetector`."""
- addresses = set()
- state = ParseState.start
- for line in body_line_iterator(msg):
- line = line.strip()
- if state is ParseState.start:
- for introtag in introtags:
- if line.startswith(introtag):
- state = ParseState.intro_paragraph_seen
- break
- elif state is ParseState.intro_paragraph_seen and not line:
- # Looking for the end of the intro paragraph.
- state = ParseState.recip_paragraph_seen
- elif state is ParseState.recip_paragraph_seen:
- if line.startswith('-'):
- # We're looking at the break paragraph, so we're done.
- break
- # At this point we know we must be looking at a recipient
- # paragraph.
- mo = acre.match(line)
- if mo:
- addresses.add(mo.group('addr'))
- # Otherwise, it must be a continuation line, so just ignore it.
- else:
- # We're not looking at anything in particular.
- pass
- return addresses