---

- name: "Postmap sasl"
  ansible.builtin.command: postmap hash:/etc/postfix/sasl_passwd
  changed_when: false

- name: "Postmap generic"
  ansible.builtin.command: postmap hash:/etc/postfix/generic
  changed_when: false

- name: "Postmap virtual"
  ansible.builtin.command: postmap hash:/etc/postfix/virtual
  changed_when: false

- name: "Run newaliases"
  ansible.builtin.command: newaliases
  changed_when: false

- name: "Restart postfix"
  ansible.builtin.service:
    name: postfix
    state: restarted

...