diff --git a/roles/base/files/postfix/main.cf/main.cf.mailman b/roles/base/files/postfix/main.cf/main.cf.mailman
index b32cc033d9..d334631534 100644
--- a/roles/base/files/postfix/main.cf/main.cf.mailman
+++ b/roles/base/files/postfix/main.cf/main.cf.mailman
@@ -698,3 +698,8 @@ relay_domains = hash:/var/lib/mailman3/data/postfix_domains
 smtpd_sender_restrictions =
 	check_sender_access regexp:/etc/postfix/sender_access
 	permit
+
+# This has to be set in newer postfix 3.3.0 or later or it will refuse to 
+# send any email. ;( 
+smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination
+smtpd_relay_restrictions = permit_mynetworks, reject_unauth_destination
\ No newline at end of file