diff --git a/compose.mailman.yml b/compose.mailman.yml
index e797764..5760679 100644
--- a/compose.mailman.yml
+++ b/compose.mailman.yml
@@ -6,6 +6,9 @@ version: "3.6"
 
 services:
   smtp:
+    environment:
+      - MAILMAN_POSTFIX_OVERRIDES
+      - SENDER_LOGINS_POSTFIX_OVERRIDES
     networks:
       - default
       - shared_mailman_network