diff --git a/stalwart/templates/deployment.yaml b/stalwart/templates/deployment.yaml
index f5803f2..b0d2bb2 100644
--- a/stalwart/templates/deployment.yaml
+++ b/stalwart/templates/deployment.yaml
@@ -14,6 +14,8 @@ spec:
       labels:
         {{- include "stalwart.selectorLabels" . | nindent 8 }}
     spec:
+      hostname: mail
+      subdomain: hensen-io
       containers:
       - name: stalwart
         image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"