diff --git a/tasks/config_univention.yml b/tasks/config_univention.yml
index 644b36e..8358627 100644
--- a/tasks/config_univention.yml
+++ b/tasks/config_univention.yml
@@ -1,5 +1,12 @@
 ---
 - block:
+    - name: Set postfix settings to registry
+      ucr:
+        path: "{{ item.path }}"
+        value: "{{ item.value }}"
+        state: "{{ item.state | default('present') }}"
+      loop: "{{ __postfix_registry_settings }}"
+
     - name: Create smtp_auth
       template:
         src: etc/postfix/sasl_passwd.j2
diff --git a/vars/univention.yml b/vars/univention.yml
index 6b748ef..1698f62 100644
--- a/vars/univention.yml
+++ b/vars/univention.yml
@@ -1,3 +1,9 @@
 ---
 __postfix_relay_packages:
   - postfix
+
+__postfix_registry_settings:
+  - path: "mail/relayhost"
+    value: "{{ postfix_relay_relayhost }}"
+  - path: "mail/relayauth"
+    value: "yes"