1 files changed, 52 insertions, 0 deletions
diff --git a/src/mailman/rules/max_recipients.py b/src/mailman/rules/max_recipients.py
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+++ b/src/mailman/rules/max_recipients.py
@@ -0,0 +1,52 @@
+# Copyright (C) 2007-2009 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/>.
+
+"""The maximum number of recipients rule."""
+
+from __future__ import absolute_import, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+    'MaximumRecipients',
+    ]
+
+
+from email.utils import getaddresses
+from zope.interface import implements
+
+from mailman.i18n import _
+from mailman.interfaces.rules 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