diff --git a/roles/mailman/templates/mailman.cfg.j2 b/roles/mailman/templates/mailman.cfg.j2
index 2a77f0be1e..bd483f01cd 100644
--- a/roles/mailman/templates/mailman.cfg.j2
+++ b/roles/mailman/templates/mailman.cfg.j2
@@ -71,6 +71,8 @@ jump_chain: discard
 [mta]
 # Email is sent on the submission port to bypass spam checking.
 smtp_port: 587
+# Remove DKIM signatures in the email headers.
+remove_dkim_headers: yes
 
 
 [language.en]