# postfix — outbound mail relay only (no inbound, no published port)
# Networks: app

services:
  postfix:
    image: boky/postfix:4.2.0
    restart: unless-stopped
    networks: [app]
    environment:
      RELAYHOST: ${POSTFIX_RELAYHOST}
      ALLOWED_SENDER_DOMAINS: ${POSTFIX_FROM_DOMAIN}
      TZ: ${TZ:-Europe/Amsterdam}
    # No 'ports:' — outbound only. Internal services hit smtp://postfix:25 on the app network.

networks:
  app: