diff --git a/kustomize/postfix-svc.yaml b/kustomize/postfix-svc.yaml
index f576a22..bc11145 100644
--- a/kustomize/postfix-svc.yaml
+++ b/kustomize/postfix-svc.yaml
@@ -10,7 +10,7 @@ spec:
     tier: smtp
   type: LoadBalancer
   ports:
-  - nodePort: 30587
-    port: 587
-    targetPort: 587
+  - nodePort: 30025
+    port: 25
+    targetPort: 25
     name: postfix-smtp
diff --git a/kustomize/roundcube-deployment.yaml b/kustomize/roundcube-deployment.yaml
index 7e91029..8c0904f 100644
--- a/kustomize/roundcube-deployment.yaml
+++ b/kustomize/roundcube-deployment.yaml
@@ -23,6 +23,8 @@ spec:
             value: mail-dovecot
           - name: ROUNDCUBEMAIL_SMTP_SERVER
             value: mail-postfix
+          - name: ROUNDCUBEMAIL_SMTP_PORT
+            value: "25"
           - name: ROUNDCUBEMAIL_DB_TYPE
             value: sqlite
         volumeMounts: