1 files changed, 48 insertions, 0 deletions

diff --git a/mailman/rules/max_recipients.py b/mailman/rules/max_recipients.py
new file mode 100644
index 000000000..48122a0cd
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+++ b/mailman/rules/max_recipients.py
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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