1 files changed, 39 insertions, 0 deletions

diff --git a/src/mailman/chains/dmarc.py b/src/mailman/chains/dmarc.py
new file mode 100644
index 000000000..6a8d4d188
--- /dev/null
+++ b/src/mailman/chains/dmarc.py
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+# Copyright (C) 2017 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/>.
+
+"""DMARC mitigation chain."""
+
+from mailman.chains.base import JumpChainBase
+from mailman.core.i18n import _
+from public import public
+
+
+@public
+class DMARCMitigationChain(JumpChainBase):
+    """Perform DMARC mitigation."""
+
+    name = 'dmarc'
+    description = _('Process DMARC reject or discard mitigations')
+
+    def jump_to(self, mlist, msg, msgdata):
+        # Which action should be taken?
+        jump_chain = msgdata['dmarc_action']
+        assert jump_chain in ('discard', 'reject'), (
+            '{}: Invalid DMARC action: {} for sender: {}'.format(
+                mlist.list_id, jump_chain,
+                msgdata.get('moderation_sender', '(unknown)')))
+        return jump_chain