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-rw-r--r--src/mailman/chains/builtin.py2
-rw-r--r--src/mailman/chains/docs/moderation.rst5
2 files changed, 7 insertions, 0 deletions
diff --git a/src/mailman/chains/builtin.py b/src/mailman/chains/builtin.py
index a3f1fccf3..9b97fef38 100644
--- a/src/mailman/chains/builtin.py
+++ b/src/mailman/chains/builtin.py
@@ -42,6 +42,8 @@ class BuiltInChain:
# jump to the moderation chain to do the action. Otherwise, the rule
# misses buts sets msgdata['dmarc'] for the handler.
('dmarc-mitigation', LinkAction.jump, 'moderation'),
+ # Discard emails with no valid senders.
+ ('no-senders', LinkAction.jump, 'discard'),
('approved', LinkAction.jump, 'accept'),
('emergency', LinkAction.jump, 'hold'),
('loop', LinkAction.jump, 'discard'),
diff --git a/src/mailman/chains/docs/moderation.rst b/src/mailman/chains/docs/moderation.rst
index e3c9e12f5..2963bd40c 100644
--- a/src/mailman/chains/docs/moderation.rst
+++ b/src/mailman/chains/docs/moderation.rst
@@ -88,6 +88,7 @@ built-in chain. No rules hit and so the message is accepted.
Hits:
Misses:
dmarc-mitigation
+ no-senders
approved
emergency
loop
@@ -126,6 +127,7 @@ moderator approval.
member-moderation
Misses:
dmarc-mitigation
+ no-senders
approved
emergency
loop
@@ -153,6 +155,7 @@ Anne's moderation action can also be set to `discard`...
member-moderation
Misses:
dmarc-mitigation
+ no-senders
approved
emergency
loop
@@ -179,6 +182,7 @@ Anne's moderation action can also be set to `discard`...
member-moderation
Misses:
dmarc-mitigation
+ no-senders
approved
emergency
loop
@@ -220,6 +224,7 @@ moderator approval.
nonmember-moderation
Misses:
dmarc-mitigation
+ no-senders
approved
emergency
loop