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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/>.
"""Microsoft's `SMTPSVC' nears I kin tell."""
from __future__ import absolute_import, unicode_literals
__metaclass__ = type
__all__ = [
'Microsoft',
]
import re
from cStringIO import StringIO
from flufl.enum import Enum
from zope.interface import implements
from mailman.interfaces.bounce import IBounceDetector
scre = re.compile(r'transcript of session follows', re.IGNORECASE)
class ParseState(Enum):
start = 0
tag_seen = 1
class Microsoft:
"""Microsoft's `SMTPSVC' nears I kin tell."""
implements(IBounceDetector)
def process(self, msg):
if msg.get_content_type() != 'multipart/mixed':
return None
# Find the first subpart, which has no MIME type.
try:
subpart = msg.get_payload(0)
except IndexError:
# The message *looked* like a multipart but wasn't.
return None
data = subpart.get_payload()
if isinstance(data, list):
# The message is a multi-multipart, so not a matching bounce.
return None
body = StringIO(data)
state = ParseState.start
addresses = set()
for line in body:
if state is ParseState.start:
if scre.search(line):
state = ParseState.tag_seen
elif state is ParseState.tag_seen:
if '@' in line:
addresses.add(line.strip())
return list(addresses)
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