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# Copyright (C) 1998,1999,2000,2001,2002 by the Free Software Foundation, Inc.
#
# This program 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 2
# of the License, or (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""Do more detailed spam detection.
This module hard codes site wide spam detection. By hacking the
KNOWN_SPAMMERS variable, you can set up more regular expression matches
against message headers. If spam is detected the message is discarded
immediately.
TBD: This needs to be made more configurable and robust.
"""
import re
from Mailman import mm_cfg
from Mailman import Errors
class SpamDetected(Errors.DiscardMessage):
"""The message contains known spam"""
def process(mlist, msg, msgdata):
if msgdata.get('approved'):
return
for header, regex in mm_cfg.KNOWN_SPAMMERS:
cre = re.compile(regex, re.IGNORECASE)
value = msg[header]
if not value:
continue
mo = cre.search(value)
if mo:
# we've detected spam, so throw the message away
raise SpamDetected
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