rh358/smtp-auto/playbook.yml

---
- name: Configure Null Client Email Service
  become: true
  hosts: nullclients

  vars:
    postfix_conf:
      relayhost: "[smtp.lab.example.com]"
      inet_interfaces: "loopback-only"
      mynetworks: "127.0.0.0/8 [::1]/128"
      mydestination: ''
      myorigin: 'lab.example.com'

  roles:
    - linux-system-roles.postfix