Use new container version and enable port forwarding

Author: nesono

roles/compose/files/docker-compose.yaml

@@ -183,7 +183,7 @@ services:
 
   # Staging: unified postfix + milters (for validation before cutover)
   postfix_staging:
-    image: nesono/postfix_for_postfixadmin:2026-04-04
+    image: nesono/postfix_for_postfixadmin:2026-04-04.1
     container_name: postfix_staging
     environment:
       MYHOSTNAME: "smtp.nesono.com"
@@ -221,6 +221,7 @@ services:
       - spamass_vhome:/vhome/users
       - /svc/volumes/acme/certs/mail.nesono.com:/etc/postfix/certs:ro
     networks:
+      - mail_external
       - mail_internal
     restart: "no"