Update to 2021-01-28 20:00

roles/postfix/handlers/main.yml

@@ -1,7 +1,5 @@
 ---
 - name: restart postfix
-  service: name=postfix state=restarted enabled=yes
+  service: name=postfix state=restarted
 
-- name: rehash relay_auth
-  command: postmap /etc/postfix/relay_auth
 ...

roles/postfix/tasks/main.yml

@@ -20,7 +20,15 @@
 
 - name: Deploy Relay authentication map
   template: src=relay_auth.j2 dest=/etc/postfix/relay_auth mode=600 owner=root group=root
-  notify: rehash relay_auth
+  register: relay_auth_file
+
+- name: Check if relay_auth has been hashed
+  stat: path=/etc/postfix/relay_auth.db
+  register: relay_auth_hashed
+
+- name: Rehash postfix relay auth
+  command: postmap /etc/postfix/relay_auth
+  when: relay_auth_file.changed or not relay_auth_hashed.stat.exists
 
 - name: Handle postfix port
   iptables_raw: