ansible/roles/docker/templates/compose-files/postfix.yml.j2

# vim: ft=yaml.docker-compose
version: "3.8"

services:
  app:
    image: boky/postfix:{{ services.postfix.version }}
    restart: always
    networks:
      postfix:
        aliases:
          - postfix
    volumes:
      - "./dkim:/etc/opendkim/keys"
    environment:
      # Get all services which have allowed_sender_domain defined
      ALLOWED_SENDER_DOMAINS: "data.coop {{ services | dict2items | selectattr('value.allowed_sender_domain', 'true') | map(attribute='value.domain') | join(' ') }}"
      HOSTNAME: "{{ services.postfix.domain }}" # the name the smtp server will identify itself as
      DKIM_AUTOGENERATE: true

networks:
  postfix:
    external: true