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diff --git a/src/mailman/bouncers/netscape.py b/src/mailman/bouncers/netscape.py
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--- a/src/mailman/bouncers/netscape.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/>.
-
-"""Netscape Messaging Server bounce formats.
-
-I've seen at least one NMS server version 3.6 (envy.gmp.usyd.edu.au) bounce
-messages of this format. Bounces come in DSN MIME format, but don't include
-any -Recipient: headers. Gotta just parse the text :(
-
-NMS 4.1 (dfw-smtpin1.email.verio.net) seems even worse, but we'll try to
-decipher the format here too.
-
-"""
-
-from __future__ import absolute_import, unicode_literals
-
-__metaclass__ = type
-__all__ = [
- 'Netscape',
- ]
-
-
-import re
-
-from cStringIO import StringIO
-from zope.interface import implements
-
-from mailman.interfaces.bounce import IBounceDetector
-
-
-pcre = re.compile(
- r'This Message was undeliverable due to the following reason:',
- re.IGNORECASE)
-
-acre = re.compile(
- r'(?P<reply>please reply to)?.*<(?P<addr>[^>]*)>',
- re.IGNORECASE)
-
-
-
-def flatten(msg, leaves):
- # Give us all the leaf (non-multipart) subparts.
- if msg.is_multipart():
- for part in msg.get_payload():
- flatten(part, leaves)
- else:
- leaves.append(msg)
-
-
-
-class Netscape:
- """Netscape Messaging Server bounce formats."""
-
- implements(IBounceDetector)
-
- def process(self, msg):
- """See `IBounceDetector`."""
-
- # Sigh. Some NMS 3.6's show
- # multipart/report; report-type=delivery-status
- # and some show
- # multipart/mixed;
- if not msg.is_multipart():
- return set()
- # We're looking for a text/plain subpart occuring before a
- # message/delivery-status subpart.
- plainmsg = None
- leaves = []
- flatten(msg, leaves)
- for i, subpart in zip(range(len(leaves)-1), leaves):
- if subpart.get_content_type() == 'text/plain':
- plainmsg = subpart
- break
- if not plainmsg:
- return set()
- # Total guesswork, based on captured examples...
- body = StringIO(plainmsg.get_payload())
- addresses = set()
- for line in body:
- mo = pcre.search(line)
- if mo:
- # We found a bounce section, but I have no idea what the
- # official format inside here is. :( We'll just search for
- # <addr> strings.
- for line in body:
- mo = acre.search(line)
- if mo and not mo.group('reply'):
- addresses.add(mo.group('addr'))
- return addresses