diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 3aa6329e..1091a2c0 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -3,18 +3,19 @@ services:
     image: boky/postfix
     restart: unless-stopped
     container_name: cmc-prod-postfix
-    # Staging: relay to Mailpit (no authentication required)
+    # Production: relay to Gmail SMTP
     environment:
-      - RELAYHOST=mailpit:1025
       - ALLOWED_SENDER_DOMAINS=cmctechnologies.com.au
-      # --- Gmail SMTP relay settings (uncomment for production) ---
-      # - RELAYHOST=smtp-relay.gmail.com
-      # - RELAYHOST_PORT=587
-      # - SMTP_USERNAME=sales
-      # - SMTP_PASSWORD=S%s'mMZ})MGsg$k!5N|mPSQ>
-      # - SMTP_TLS_SECURITY_LEVEL=encrypt
-      # - SMTP_USE_TLS=yes
-      # - SMTP_USE_STARTTLS=yes
+      # Gmail SMTP relay settings
+      - RELAYHOST=smtp-relay.gmail.com
+      - RELAYHOST_PORT=587
+      - SMTP_USERNAME=sales
+      - SMTP_PASSWORD=S%s'mMZ})MGsg$k!5N|mPSQ>
+      - SMTP_TLS_SECURITY_LEVEL=encrypt
+      - SMTP_USE_TLS=yes
+      - SMTP_USE_STARTTLS=yes
+      # --- Mailpit relay (for testing only) ---
+      # - RELAYHOST=mailpit:1025
     ports:
       - "25:25"
     networks: