--- version: '3' services: smtp: image: schickling/mailcatcher ports: - '1025:1025' labels: - 'traefik.frontend.rule=Host:mail.example.com' - 'traefik.port=1080' - 'traefik.http.routers.mail.rule=Host(`mail.example.com`)' - 'traefik.http.routers.mail.entrypoints=https' - 'traefik.http.routers.mail.tls=true' - 'traefik.http.services.mail.loadbalancer.server.port=1080' networks: - authelianet ...