ansible-base/roles/postfix/tasks/main.yml

---
- name: Include OS-specific variables.
  include_vars: "{{ ansible_os_family }}.yml"

- name: Ensure postfix is installed.
  package:
    name: postfix
    state: present

- name: Update mail aliases.
  lineinfile:
    dest: "{{ aliases_config_file }}"
    line: "root: {{ alias_email }}"
    regexp: "^root:"
  when: alias_email != "root"
  notify: update aliases

- name: Update Postfix configuration.
  lineinfile:
    dest: "{{ postfix_config_file }}"
    line: "{{ item.name }} = {{ item.value }}"
    regexp: "^{{ item.name }} ="
  with_items:
    - name: inet_interfaces
      value: "{{ postfix_inet_interfaces }}"
    - name: inet_protocols
      value: "{{ postfix_inet_protocols }}"
    - name: myhostname
      value: "{{ inventory_hostname }}"
  notify: restart postfix

- name: Ensure postfix is started and enabled at boot.
  service:
    name: postfix
    enabled: "{{ postfix_service_enabled }}"
  notify: restart postfix