oxmix/postfix repository overview

services:
  postfix:
    image: oxmix/postfix
    ports:
      - 25:25
    environment:
      DOMAIN=example.test
      DKIM_TXT: |
        mail._domainkey IN TXT ( "v=DKIM1; h=sha256; k=rsa; "
        ...
      DKIM_KEY: |
        -----BEGIN RSA PRIVATE KEY-----
        ...
    logging:
      driver: "json-file"
      options:
        max-size: "100k"
    restart: unless-stopped