fixing postfix forwarding to mailpit

docker-compose.prod.yml

@@ -5,7 +5,7 @@ services:
     container_name: cmc-prod-postfix
     # Staging: relay to Mailpit (no authentication required)
     environment:
-      - RELAYHOST=mailpit.stg.internal
+      - RELAYHOST=mailpit
       - RELAYHOST_PORT=1025
       - ALLOWED_SENDER_DOMAINS=*
       # --- Gmail SMTP relay settings (uncomment for production) ---
@@ -18,6 +18,9 @@ services:
       # - SMTP_USE_STARTTLS=yes
     ports:
       - "25:25"
+    networks:
+      - cmc-stg-network
+      - cmc-prod-network
   nginx:
     image: nginx:latest
     container_name: cmc-prod-nginx

docker-compose.stg.yml

@@ -5,7 +5,7 @@ services:
     container_name: cmc-stg-postfix
     # Staging: relay to Mailpit (no authentication required)
     environment:
-      - RELAYHOST=mailpit.stg.internal
+      - RELAYHOST=mailpit
       - RELAYHOST_PORT=1025
       - ALLOWED_SENDER_DOMAINS=cmctechnologies.com.au
       # --- Gmail SMTP relay settings (uncomment for production) ---