docker-compose.yml

version: '3.3'

services:

  minimail:
    build: .
    image: ghcr.io/servercontainers/minimail
    restart: always
    environment:
      MAIL_FQDN: internal.doe-mailservers.tld
      POSTFIX_SMTPD_BANNER: internal.doe-mailservers.tld ESMTP

      # relay outgoing mails through the configured mx servers of domain doe-mailservers.tld
      RELAYHOST: "doe-mailservers.tld:587"
      POSTFIX_SSL_OUT_SECURITY_LEVEL: encrypt

      # wait a few days until we throw away mails we cannot deliver
      POSTFIX_QUEUE_LIFETIME_MAX: 11d
      POSTFIX_QUEUE_LIFETIME_BOUNCE: 10d

      # create a mail account for user johndoe - accountname: hon@doe.io
      ACONF_USER_ACCOUNT_NAME_johndoe: john@doe.io
      # password hash for: asdf
      ACONF_USER_PASSWORD_HASH_johndoe: '{BLF-CRYPT}$$2y$$05$$Zl.hPiR36SPW4cG.O1aRAOry1qLgz5gwWig05EkNNGytfmbYSlsI6'
      # additional domains john will use
      ACONF_USER_ALIASES_johndoe: postmaster@otherdomain.com mail@johndoe.tld git@otherdomain.com postmaster@johndoe.tld webmaster@johndoe.tld mail@johndoe.com mail@john.com
    volumes:
      # recommendation: make it read only once it works
      #- ./tls:/etc/postfix/tls:ro
      - ./tls:/etc/postfix/tls
      - ./additional:/etc/postfix/additional
      - ./mail:/var/vmail
    ports:
      - "25:25"
      - "143:143"
      - "587:587"
      - "993:993"