Mailcow Tutorial - Override

docker-compose.override.yml

version: '2.1'
services:
    nginx-mailcow:
      labels:
        - "traefik.enable=true"
        - "traefik.http.routers.nginx-mailcow.entrypoints=web"
        - "traefik.http.routers.nginx-mailcow.rule=HostRegexp(`{host:(autodiscover|autoconfig|webmail|mail|email).+}`)"
        - "traefik.http.middlewares.nginx-mailcow-https-redirect.redirectscheme.scheme=https"
        - "traefik.http.routers.nginx-mailcow.middlewares=nginx-mailcow-https-redirect"
        - "traefik.http.routers.nginx-mailcow-secure.entrypoints=web-secure"
        - "traefik.http.routers.nginx-mailcow-secure.rule=Host(`mail.example.de`)" # YOUR EMAIL SUBDMAIN
        - "traefik.http.routers.nginx-mailcow-secure.tls=true"
        - "traefik.http.routers.registry-secured.tls.certresolver=myCertResolver" # ADD your Certresolver here
        - "traefik.http.routers.nginx-mailcow-secure.service=nginx-mailcow"
        - "traefik.http.services.nginx-mailcow.loadbalancer.server.port=80"
        - "traefik.docker.network=main"
      networks:
        main:
    certdumper:
        image: humenius/traefik-certs-dumper
        container_name: traefik_certdumper
        restart: unless-stopped
        network_mode: none
        command: --restart-containers mailcowdockerized_postfix-mailcow_1,mailcowdockerized_dovecot-mailcow_1
        volumes:
          # mount the folder which contains Traefik's `acme.json' file
          #   in this case Traefik is started from its own docker-compose in ../traefik
          - /home/niklas/letsencrypt:/traefik:ro
          # mount mailcow's SSL folder
          - /var/run/docker.sock:/var/run/docker.sock:ro
          - ./data/assets/ssl:/output:rw
        environment:
          - DOMAIN=mail.example.de   # YOUR EMAIL SUBDOMAIN HERE
networks:
  main: # YOUR TRAEFIK NETWORK HERE
    external: true

I'm not sure if this is correct, but in order to get my traefik to get a letsencrypt cert I had to change,

- "traefik.http.routers.registry-secured.tls.certresolver=myCertResolver" # ADD your Certresolver here

to

- "traefik.http.routers.nginx-mailcow-secure.tls.certresolver=myCertResolver" # ADD your Certresolver here