diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 3021235a..ae74666b 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -18,7 +18,6 @@ services:
     ports:
       - "25:25"
     networks:
-      - cmc-stg-network
       - cmc-prod-network
   nginx:
     image: nginx:latest
diff --git a/docker-compose.stg.yml b/docker-compose.stg.yml
index f7691a39..7d3cd5f1 100644
--- a/docker-compose.stg.yml
+++ b/docker-compose.stg.yml
@@ -107,13 +107,15 @@ services:
       - "1025:1025"  # SMTP
     networks:
       - cmc-stg-network
-      - cmc-prod-network
+      - cmc-sales-prod_cmc-prod-network
     restart: unless-stopped
 
+
 networks:
   cmc-stg-network:
 
-  cmc-prod-network:
+  cmc-sales-prod_cmc-prod-network:
+    external: true
 
 volumes:
   db_data: