--- - name: setup network for postfix 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 vars: mynetworks: - 127.0.0.0/8 - 10.0.0.0/8 - 172.16.0.0/12 - 192.168.0.0/16 - 172.19.199.2 - 172.19.199.3 docker_container: name: postfix image: boky/postfix restart_policy: unless-stopped networks: - name: postfix env: ALLOWED_SENDER_DOMAINS: "{{ base_domain }}" MYNETWORKS: "{{ mynetworks|join(',') }}"