use become

handlers/main.yml

@@ -1,5 +1,5 @@
 ---
-- name: Restart postfix
+- name: Restart service
   service:
     name: postfix
     state: restarted

tasks/config.yml

@@ -1,5 +1,7 @@
 ---
-- name: Configure postfix
+- name: Setup postfix
+  block:
+  - name: Configure postfix
     template:
       src: etc/postfix/main.cf.j2
       dest: /etc/postfix/main.cf
@@ -8,7 +10,7 @@
       mode: 0644
     notify: postfix_restart
 
-- name: Create sasl
+  - name: Create sasl
     template:
       src: etc/postfix/sasl_passwd.j2
       dest: /etc/postfix/sasl_passwd
@@ -17,18 +19,18 @@
       mode: 0600
     register: sasl_result
 
-- name: Ensure sasl_passwd.db exist
+  - name: Ensure sasl_passwd.db exist
     stat:
       path: /etc/postfix/sasl_passwd.db
     register: sasldb
 
-- name: Create sasl_passwd.db
+  - name: Create sasl_passwd.db
     command: /usr/sbin/postmap hash:/etc/postfix/sasl_passwd
     when: not sasldb.stat.exists or sasl_result.changed
     register: sasldb_update
     notify: postfix_restart
 
-- name: Set permissions for sasl_passwd.db
+  - name: Set permissions for sasl_passwd.db
     file:
       path: /etc/postfix/sasl_passwd.db
       owner: root
@@ -36,7 +38,7 @@
       mode: 0600
     notify: postfix_restart
 
-- name: Override outgoing header
+  - name: Override outgoing header
     template:
       src: etc/postfix/sender_canonical.j2
       dest: /etc/postfix/sender_canonical
@@ -45,13 +47,14 @@
       mode: 0600
     register: sender_result
 
-- name: Ensure sender_canonical.db exist
+  - name: Ensure sender_canonical.db exist
     stat:
       path: /etc/postfix/sender_canonical.db
     register: senderdb
 
-- name: Hash sender_canoncial
+  - name: Hash sender_canoncial
     command: "/usr/sbin/postmap hash:/etc/postfix/sender_canonical"
     when: not senderdb.stat.exists or sender_result.changed
     register: senderdb_update
     notify: postfix_restart
+  become: True

tasks/install.yml

@@ -1,5 +1,7 @@
 ---
 - name: Install postfix mta
+  block:
+  - name: Install required packages
     package:
       name: '{{ item }}'
       state: latest
@@ -7,3 +9,4 @@
       - postfix
       - cyrus-sasl-plain
       - mailx
+  become: True