1 files changed, 6 insertions, 1 deletions

diff --git a/src/mailman/styles/base.py b/src/mailman/styles/base.py
index 02a17d54d..693a2ab14 100644
--- a/src/mailman/styles/base.py
+++ b/src/mailman/styles/base.py
@@ -31,7 +31,7 @@ from mailman.interfaces.autorespond import ResponseAction
 from mailman.interfaces.bounce import UnrecognizedBounceDisposition
 from mailman.interfaces.digests import DigestFrequency
 from mailman.interfaces.mailinglist import (
-    Personalization, ReplyToMunging, SubscriptionPolicy)
+    DMARCMitigateAction, Personalization, ReplyToMunging, SubscriptionPolicy)
 from mailman.interfaces.nntp import NewsgroupModeration
 from public import public
 
@@ -85,6 +85,11 @@ class BasicOperation:
         mlist.digest_send_periodic = True
         mlist.digest_volume_frequency = DigestFrequency.monthly
         mlist.next_digest_number = 1
+        # DMARC
+        mlist.dmarc_mitigate_action = DMARCMitigateAction.no_mitigation
+        mlist.dmarc_mitigate_unconditionally = False
+        mlist.dmarc_moderation_notice = ''
+        mlist.dmarc_wrapped_message_text = ''
         # NNTP gateway
         mlist.nntp_host = ''
         mlist.linked_newsgroup = ''