externalTrafficPolicy could not set if service type is ClusterIP

Otherwise we got the following error:

Error: Service "develop-occonnect-eau-docker-mailserver" is invalid:
spec.externalTrafficPolicy: Invalid value: "Cluster":
ExternalTrafficPolicy can only be set on NodePort and LoadBalancer
service

Author: Sascha Girrulat

charts/docker-mailserver/templates/service.yaml

@@ -25,7 +25,7 @@ spec:
   ## rather than the legacy one.
   {{- if eq .Values.service.type "LoadBalancer" }}
   externalTrafficPolicy: Local
-  {{ else }}
+  {{- else if eq .Values.service.type "NodePort" }}
   externalTrafficPolicy: Cluster
   {{ end }}
   selector: