version: '3.4' services: dovecot: image: dovecot/dovecot:2.3.19.1 ports: - "993:993/tcp" maddy: build: context: ./docker/maddy/ image: maddy ports: - "994:993/tcp" cyrus: build: context: ./docker/cyrus/ image: cyrus volumes: - "/dev/log:/dev/log" ports: - "143:143/tcp"