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# Copyright (C) 1998-2008 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.
"""Cleanse certain headers from all messages."""
__metaclass__ = type
__all__ = ['Cleanse']
import logging
from email.Utils import formataddr
from zope.interface import implements
from mailman.i18n import _
from mailman.interfaces import IHandler
from mailman.pipeline.cook_headers import uheader
log = logging.getLogger('mailman.post')
class Cleanse:
"""Cleanse certain headers from all messages."""
implements(IHandler)
name = 'cleanse'
description = _('Cleanse certain headers from all messages.')
def process(self, mlist, msg, msgdata):
"""See `IHandler`."""
# Remove headers that could contain passwords.
del msg['approved']
del msg['approve']
del msg['urgent']
# We remove other headers from anonymous lists.
if mlist.anonymous_list:
log.info('post to %s from %s anonymized',
mlist.fqdn_listname, msg.get('from'))
del msg['from']
del msg['reply-to']
del msg['sender']
# Hotmail sets this one
del msg['x-originating-email']
i18ndesc = str(uheader(mlist, mlist.description, 'From'))
msg['From'] = formataddr((i18ndesc, mlist.posting_address))
msg['Reply-To'] = mlist.posting_address
# Some headers can be used to fish for membership.
del msg['return-receipt-to']
del msg['disposition-notification-to']
del msg['x-confirm-reading-to']
# Pegasus mail uses this one... sigh.
del msg['x-pmrqc']
# Don't let this header be spoofed. See RFC 5064.
del msg['archived-at']
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