docker-mx-server/docker-compose.yml

version: '2'

services:
    database:
        build: ./postgresql
        container_name: mx-postgresql
        networks:
            internal.docker:
                aliases:
                    - postgresql.internal.docker
        volumes:
            - ./data/postgresql/data:/var/lib/postgresql/data
        ports:
            - "127.0.0.1:34000:5432"
        env_file:
            - env

    postfixadmin:
        build: ./postfixadmin
        container_name: mx-postfixadmin
        networks:
            internal.docker:
                aliases:
                    - postfixadmin.internal.docker
        ports:
            - "127.0.0.1:34001:80"
        env_file:
            - env

    postfix:
        build: ./postfix
        container_name: mx-postfix
        networks:
            internal.docker:
                aliases:
                    - postfix.internal.docker
        volumes:
          - ./data/email:/var/email
        ports:
            - "0.0.0.0:25:25"
            - "0.0.0.0:587:587"
        env_file:
            - env

networks:
    internal.docker: