services:
  mail:
    build: .
    container_name: mail
    hostname: hetzner.yyamashita.com
    env_file: .env
    volumes:
      - /etc/opendkim:/etc/opendkim:ro
      - mail_queue:/var/spool/postfix
    dns:
      - 8.8.8.8
      - 1.1.1.1
    restart: unless-stopped
    networks:
      - web

networks:
  web:
    external: true
    name: web

volumes:
  mail_queue: