Try smtp with metallb

manifests/mailu/values.yaml

@@ -34,12 +34,15 @@ tls:
   certmanager:
     enabled: true
 
+service:
+  front:
+    type: ClusterIP
+    port: 80
+    targetPort: 80
+
 front:
   realIpFrom:
     - 192.168.10.0/24
-  nodeSelector:
-    node-role.kubernetes.io/worker: "true"
-
   externalService:
     enabled: true
     type: LoadBalancer
@@ -53,6 +56,8 @@ front:
       pop3: false
       pop3s: false
       manageSieve: false
+  nodeSelector:
+    kubernetes.io/hostname: k3s-worker-3
 
 dkim:
   enabled: true