Try smtp with metallb

manifests/mailu/values.yaml

@@ -10,6 +10,7 @@ ingress:
   annotations:
     traefik.ingress.kubernetes.io/router.entrypoints: "web,websecure"
     traefik.ingress.kubernetes.io/router.tls: "true"
+    nginx.ingress.kubernetes.io/backend-protocol: "HTTP"
   hosts:
     - host: mail.dvirlabs.com
       paths:
@@ -33,18 +34,30 @@ tls:
   certmanager:
     enabled: true
 
+# Internal service (ClusterIP)
+service:
   front:
-  nodeSelector:
-    node-role.kubernetes.io/worker: "true"
+    type: ClusterIP
+    port: 80
+    targetPort: 80
+
+# External access via MetalLB (LoadBalancer)
+front:
+  realIpFrom:
+    - 192.168.10.0/24
   externalService:
     enabled: true
     type: LoadBalancer
     externalTrafficPolicy: Cluster
     ports:
-      smtp: true
-      submission: true
-      imap: true
-      imaps: true
+      smtp: true         # port 25
+      submission: true   # port 587
+      imap: true         # port 143
+      imaps: true        # port 993
+    # Optional: You can manually specify a loadBalancerIP here if you want to fix the IP
+    # loadBalancerIP: 192.168.10.241
+  nodeSelector:
+    node-role.kubernetes.io/worker: "true"
 
 dkim:
   enabled: true