--- - name: setup network for postfix community.docker.docker_network: name: postfix ipam_config: - subnet: 172.16.0.0/16 gateway: 172.16.0.1 - name: setup postfix docker container for outgoing mail community.docker.docker_container: name: postfix image: boky/postfix:{{ services.postfix.version }} restart_policy: always networks: - name: postfix env: # Get all services which have allowed_sender_domain defined ALLOWED_SENDER_DOMAINS: "{{ services | dict2items | selectattr('value.allowed_sender_domain',\ \ 'defined') | map(attribute='value.domain') | list | join(' ') }}" HOSTNAME: smtp.data.coop # the name the smtp server will identify itself as