80 lines
2.6 KiB
Python
80 lines
2.6 KiB
Python
# Copyright (C) 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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"""Yale's mail server is pretty dumb.
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Its reports include the end user's name, but not the full domain. I think we
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can usually guess it right anyway. This is completely based on examination of
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the corpse, and is subject to failure whenever Yale even slightly changes
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their MTA. :(
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"""
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import re
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from cStringIO import StringIO
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from email.Utils import getaddresses
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scre = re.compile(r'Message not delivered to the following', re.IGNORECASE)
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ecre = re.compile(r'Error Detail', re.IGNORECASE)
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acre = re.compile(r'\s+(?P<addr>\S+)\s+')
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def process(msg):
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if msg.is_multipart():
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return None
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try:
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whofrom = getaddresses([msg.get('from', '')])[0][1]
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if not whofrom:
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return None
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username, domain = whofrom.split('@', 1)
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except (IndexError, ValueError):
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return None
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if username.lower() <> 'mailer-daemon':
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return None
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parts = domain.split('.')
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parts.reverse()
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for part1, part2 in zip(parts, ('edu', 'yale')):
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if part1 <> part2:
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return None
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# Okay, we've established that the bounce came from the mailer-daemon at
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# yale.edu. Let's look for a name, and then guess the relevant domains.
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names = {}
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body = StringIO(msg.get_payload())
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state = 0
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# simple state machine
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# 0 == init
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# 1 == intro found
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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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if state == 0 and scre.search(line):
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state = 1
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elif state == 1 and ecre.search(line):
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break
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elif state == 1:
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mo = acre.search(line)
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if mo:
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names[mo.group('addr')] = 1
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# Now we have a bunch of names, these are either @yale.edu or
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# @cs.yale.edu. Add them both.
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addrs = []
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for name in names.keys():
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addrs.append(name + '@yale.edu')
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addrs.append(name + '@cs.yale.edu')
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return addrs
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