diff --git a/manifests/mailu/values.yaml b/manifests/mailu/values.yaml
index 4237ba5..f02ebb8 100644
--- a/manifests/mailu/values.yaml
+++ b/manifests/mailu/values.yaml
@@ -40,6 +40,7 @@ service:
   smtp:
     type: NodePort
     port: 25
+    nodePort: 31025
 
 dkim:
   enabled: true