89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
# Copyright (C) 1998,1999,2000,2001,2002 by the Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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"""Netscape Messaging Server bounce formats.
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I've seen at least one NMS server version 3.6 (envy.gmp.usyd.edu.au) bounce
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messages of this format. Bounces come in DSN MIME format, but don't include
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any -Recipient: headers. Gotta just parse the text :(
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NMS 4.1 (dfw-smtpin1.email.verio.net) seems even worse, but we'll try to
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decipher the format here too.
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"""
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import re
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from cStringIO import StringIO
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pcre = re.compile(
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r'This Message was undeliverable due to the following reason:',
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re.IGNORECASE)
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acre = re.compile(
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r'(?P<reply>please reply to)?.*<(?P<addr>[^>]*)>',
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re.IGNORECASE)
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def flatten(msg, leaves):
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# give us all the leaf (non-multipart) subparts
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if msg.is_multipart():
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for part in msg.get_payload():
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flatten(part, leaves)
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else:
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leaves.append(msg)
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def process(msg):
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# Sigh. Some show NMS 3.6's show
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# multipart/report; report-type=delivery-status
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# and some show
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# multipart/mixed;
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if not msg.is_multipart():
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return None
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# We're looking for a text/plain subpart occuring before a
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# message/delivery-status subpart.
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plainmsg = None
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leaves = []
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flatten(msg, leaves)
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for i, subpart in zip(range(len(leaves)-1), leaves):
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if subpart.get_content_type() == 'text/plain':
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plainmsg = subpart
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break
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if not plainmsg:
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return None
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# Total guesswork, based on captured examples...
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body = StringIO(plainmsg.get_payload())
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addrs = []
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while 1:
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line = body.readline()
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if not line:
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break
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mo = pcre.search(line)
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if mo:
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# We found a bounce section, but I have no idea what the official
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# format inside here is. :( We'll just search for <addr>
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# strings.
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while 1:
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line = body.readline()
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if not line:
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break
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mo = acre.search(line)
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if mo and not mo.group('reply'):
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addrs.append(mo.group('addr'))
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return addrs
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