gruppometasrl/postfix repository overview

version: '3'
services:
 postfix:
  image: gruppometasrl/postfix
  environment:
   - maildomain=mail.example.com
   - smtp_user=user:password  # Or multi user, see https://hub.docker.com/r/catatnight/postfix
  volumes:
   - ./certs:/etc/postfix/certs
  ports:
   - "587:587"