diff --git a/README.md b/README.md
index a9d9c49..fb08c16 100644
--- a/README.md
+++ b/README.md
@@ -460,6 +460,7 @@ Chart configuration is as follows:
 | `service.port` | `587` | SMTP submission port |
 | `service.labels` | `{}` | Additional service labels |
 | `service.annotations` | `{}` | Additional service annotations |
+| `service.spec` | `{}` | Additional service specifications |
 | `service.nodePort` | *empty* | Use a specific `nodePort` |
 | `service.nodeIP` | *empty* | Use a specific `nodeIP` |
 | `resources` | `{}` | [Pod resources](https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/) |
diff --git a/helm/mail/templates/service.yaml b/helm/mail/templates/service.yaml
index 6e40391..9356408 100644
--- a/helm/mail/templates/service.yaml
+++ b/helm/mail/templates/service.yaml
@@ -13,6 +13,7 @@ metadata:
     {{- with .Values.service.annotations }}{{ toYaml . | nindent 4 }}{{ end }}
 spec:
   type: {{ .Values.service.type }}
+  {{- with .Values.service.spec }}{{ toYaml . | nindent 2 }}{{ end }}
   ports:
     - port: {{ .Values.service.port }}
       targetPort: smtp
diff --git a/helm/test_6_service_spec.yml b/helm/test_6_service_spec.yml
new file mode 100644
index 0000000..9708e34
--- /dev/null
+++ b/helm/test_6_service_spec.yml
@@ -0,0 +1,6 @@
+# copy over all values from the service.spc
+service:
+  type: LoadBalancer
+  spec:
+    loadBalancerIP: 10.10.100.100
+    externalTrafficPolicy: Local