fix notification; add missing become_user

handlers/main.yml

@@ -3,6 +3,6 @@
   service:
     name: postfix
     state: restarted
-  listen:
-    - "postfix_restart"
+  listen: __postfix_restart
   become: True
+  become_user: root

tasks/config.yml

@@ -8,7 +8,7 @@
         owner: root
         group: root
         mode: 0644
-      notify: postfix_restart
+      notify: __postfix_restart
 
     - name: Create sasl
       template:
@@ -28,7 +28,7 @@
       command: /usr/sbin/postmap hash:/etc/postfix/sasl_passwd
       when: not sasldb.stat.exists or sasl_result.changed
       register: sasldb_update
-      notify: postfix_restart
+      notify: __postfix_restart
 
     - name: Set permissions for sasl_passwd.db
       file:
@@ -36,7 +36,7 @@
         owner: root
         group: root
         mode: 0600
-      notify: postfix_restart
+      notify: __postfix_restart
 
     - name: Override outgoing header
       template:
@@ -56,6 +56,6 @@
       command: "/usr/sbin/postmap hash:/etc/postfix/sender_canonical"
       when: not senderdb.stat.exists or sender_result.changed
       register: senderdb_update
-      notify: postfix_restart
+      notify: __postfix_restart
   become: True
   become_user: root

tasks/install.yml

@@ -10,3 +10,4 @@
         - cyrus-sasl-plain
         - mailx
   become: True
+  become_user: root