ansible-playbooks/roles/common/tasks/smtp.yml

- name: Install postfix packages
  action: apt pkg=postfix state=installed update_cache=yes
  when_boolean: ${with_smtp}

- name: Install mail aliases file
  action: template src=aliases.j2 dest=/etc/aliases owner=root group=root mode=0644
  notify:
    - Regenerate aliases cache
  when_boolean: ${with_smtp}

- name: Install postfix main configuration
  action: template src=postfix/main.cf.j2 dest=/etc/postfix/main.cf owner=root group=root mode=0644
  notify:
    - Restart postfix
  when_boolean: ${with_smtp}