Poste.io + Traefik v3 | Docker Compose Setup

docker-compose.yml

networks:
  traefik-proxy:
    name: traefik_gateway
    external: true

services:
  mailserver:
    image: analogic/poste.io
    container_name: mailserver
    hostname: mail.example.com
    restart: always
    environment:
      - DISABLE_CLAMAV=TRUE
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - ./data:/data
    labels:
      - "traefik.enable=true"

      - "traefik.http.routers.mailserver.entrypoints=web"
      - "traefik.http.routers.mailserver.rule=Host(`mail.example.com`)"
      - "traefik.http.routers.mailserver.service=mailserver"
      - "traefik.http.services.mailserver.loadbalancer.server.port=80"

      - "traefik.tcp.routers.mailserver.entrypoints=websecure"
      - "traefik.tcp.routers.mailserver.rule=HostSNI(`mail.example.com`)"
      - "traefik.tcp.routers.mailserver.service=mailserver"
      - "traefik.tcp.routers.mailserver.tls.passthrough=true"
      - "traefik.tcp.services.mailserver.loadbalancer.server.port=443"
    networks:
      - traefik-proxy
    extra_hosts:
      - "host.docker.internal:host-gateway"
    ports:
      - "25:25"
      - "110:110"
      - "143:143"
      - "465:465"
      - "587:587"
      - "993:993"
      - "995:995"