Try smtp with metallb

manifests/mailu/values.yaml

@@ -34,8 +34,8 @@ tls:
     enabled: true
 
 front:
-  realIpFrom:
+  nodeSelector:
-    - 192.168.10.0/24
+    node-role.kubernetes.io/worker: "true"
   externalService:
     enabled: true
     type: LoadBalancer
@@ -45,9 +45,6 @@ front:
       submission: true
       imap: true
       imaps: true
-      pop3: false
-      pop3s: false
-      manageSieve: false
 
 dkim:
   enabled: true