diff --git a/deployment/deploy-yml.tmpl b/deployment/deploy-yml.tmpl
index b6227f1..f13adee 100644
--- a/deployment/deploy-yml.tmpl
+++ b/deployment/deploy-yml.tmpl
@@ -17,7 +17,7 @@ spec:
   usages:
     - server auth
   dnsNames:
-    - mx.mainscnt.eu
+    - mx.hottis.de
   issuerRef:
     name: letsencrypt-staging-http
     kind: ClusterIssuer