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# Copyright (C) 2007-2008 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.
"""The maximum number of recipients rule."""
__all__ = ['MaximumRecipients']
__metaclass__ = type
from email.utils import getaddresses
from zope.interface import implements
from mailman.i18n import _
from mailman.interfaces import IRule
class MaximumRecipients:
"""The maximum number of recipients rule."""
implements(IRule)
name = 'max-recipients'
description = _('Catch messages with too many explicit recipients.')
record = True
def check(self, mlist, msg, msgdata):
"""See `IRule`."""
# Zero means any number of recipients are allowed.
if mlist.max_num_recipients == 0:
return False
# Figure out how many recipients there are
recipients = getaddresses(msg.get_all('to', []) +
msg.get_all('cc', []))
return len(recipients) >= mlist.max_num_recipients
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