Stalwart Traefik configuration

README.md

Test commands with openssl

SMTP 25

openssl s_client -quiet -crlf -starttls smtp -connect mail.example.com:25

SMTP 587

openssl s_client -starttls smtp -quiet -crlf -connect mail.example.com:587

SMTP 465

openssl s_client -quiet -crlf -connect mail.example.com:465

IMAP 143

openssl s_client -crlf -connect mail.example.com:143 -starttls imap -servername mail.example.com

IMAP 993

openssl s_client -quiet -crlf -connect mail.example.com:993

SIEVE 4190

openssl s_client -showcerts -servername mail.example.com -connect mail.example.com:4190

JMAP 443

curl -u admin:'password' https://mail.example.com/.well-known/jmap

config.toml

authentication.fallback-admin.secret = "SECRET"
authentication.fallback-admin.user = "admin"
certificate.traefik.cert = "%{file:/opt/certs/mail.example.com/cert.pem}%"
certificate.traefik.default = true
certificate.traefik.private-key = "%{file:/opt/certs/mail.example.com/key.pem}%"
cluster.node-id = 1
directory.internal.store = "rocksdb"
directory.internal.type = "internal"
lookup.default.hostname = "mail.example.com"
server.http.permissive-cors = false
server.http.url = "protocol + '://' + key_get('default', 'hostname') + ':' + local_port"
server.http.use-x-forwarded = false
server.listener.http.bind = "[::]:8080"
server.listener.http.protocol = "http"
server.listener.https.bind = "[::]:443"
server.listener.https.protocol = "http"
server.listener.https.tls.implicit = true
server.listener.imap.bind = "[::]:143"
server.listener.imap.protocol = "imap"
server.listener.imap.proxy.override = false
server.listener.imap.socket.override = false
server.listener.imap.tls.implicit = false
server.listener.imap.tls.override = false
server.listener.imaptls.bind = "[::]:993"
server.listener.imaptls.protocol = "imap"
server.listener.imaptls.proxy.override = true
server.listener.imaptls.proxy.trusted-networks.0000 = "172.18.0.0/16"
server.listener.imaptls.socket.override = false
server.listener.imaptls.tls.implicit = true
server.listener.imaptls.tls.override = false
server.listener.sieve.bind = "[::]:4190"
server.listener.sieve.protocol = "managesieve"
server.listener.sieve.proxy.override = true
server.listener.sieve.proxy.trusted-networks.0000 = "172.18.0.0/16"
server.listener.sieve.socket.override = false
server.listener.sieve.tls.implicit = true
server.listener.sieve.tls.override = false
server.listener.smtp.bind = "[::]:25"
server.listener.smtp.protocol = "smtp"
server.listener.smtp.proxy.override = false
server.listener.smtp.socket.override = false
server.listener.smtp.tls.implicit = false
server.listener.smtp.tls.override = false
server.listener.submission.bind = "[::]:587"
server.listener.submission.protocol = "smtp"
server.listener.submission.proxy.override = false
server.listener.submission.socket.override = false
server.listener.submission.tls.implicit = false
server.listener.submission.tls.override = false
server.listener.submissions.bind = "[::]:465"
server.listener.submissions.protocol = "smtp"
server.listener.submissions.proxy.override = true
server.listener.submissions.proxy.trusted-networks.0000 = "172.18.0.0/16"
server.listener.submissions.socket.override = false
server.listener.submissions.tls.implicit = true
server.listener.submissions.tls.override = false
server.max-connections = 8192
server.socket.backlog = 1024
server.socket.nodelay = true
server.socket.reuse-addr = true
server.socket.reuse-port = true
server.tls.certificate = "traefik"
server.tls.enable = true
storage.blob = "rocksdb"
storage.data = "rocksdb"
storage.directory = "internal"
storage.fts = "rocksdb"
storage.lookup = "rocksdb"
store.rocksdb.compression = "lz4"
store.rocksdb.path = "/opt/stalwart-mail/data"
store.rocksdb.type = "rocksdb"
tracer.log.ansi = false
tracer.log.enable = true
tracer.log.level = "info"
tracer.log.path = "/opt/stalwart-mail/logs"
tracer.log.prefix = "stalwart.log"
tracer.log.rotate = "daily"
tracer.log.type = "log"

stalwart-compose.yml

services:
  mail-server:
    volumes:
        - ./data:/opt/stalwart-mail
        - /home/docker/traefik/letsencrypt/dumped:/opt/certs:ro
    container_name: stalwart-mail
    image: stalwartlabs/mail-server:latest
    security_opt: [no-new-privileges:true]
    ports:
        - 25:25
        - 143:143
        - 587:587
    labels:
      - "traefik.enable=true"
      # admin ui
      - traefik.http.routers.stalwart.rule=Host(`mail.example.com`)
      - traefik.http.routers.stalwart.entrypoints=https
      - traefik.http.routers.stalwart.tls.certresolver=le
      - traefik.http.routers.stalwart.service=stalwart
      - traefik.http.services.stalwart.loadbalancer.server.port=8080
      # jmap
      - traefik.tcp.routers.jmap.rule=HostSNI(`*`)
      - traefik.tcp.routers.jmap.entrypoints=https
      - traefik.tcp.routers.jmap.tls.passthrough=true
      - traefik.tcp.routers.jmap.service=jmap
      - traefik.tcp.services.jmap.loadbalancer.server.port=443
      - traefik.tcp.services.jmap.loadbalancer.proxyProtocol.version=2
      # esmtp
      - traefik.tcp.routers.esmtp.rule=HostSNI(`*`)
      - traefik.tcp.routers.esmtp.entrypoints=esmtp
      - traefik.tcp.routers.esmtp.tls.passthrough=true
      - traefik.tcp.routers.esmtp.service=esmtp
      - traefik.tcp.services.esmtp.loadbalancer.server.port=465
      - traefik.tcp.services.esmtp.loadbalancer.proxyProtocol.version=2
      # imap-ssl
      - traefik.tcp.routers.imap-ssl.rule=HostSNI(`*`)
      - traefik.tcp.routers.imap-ssl.entrypoints=imap-ssl
      - traefik.tcp.routers.imap-ssl.tls.passthrough=true
      - traefik.tcp.routers.imap-ssl.service=imap-ssl
      - traefik.tcp.services.imap-ssl.loadbalancer.server.port=993
      - traefik.tcp.services.imap-ssl.loadbalancer.proxyProtocol.version=2
      # sieve
      - traefik.tcp.routers.sieve.rule=HostSNI(`*`)
      - traefik.tcp.routers.sieve.entrypoints=sieve
      - traefik.tcp.routers.sieve.tls.passthrough=true
      - traefik.tcp.routers.sieve.service=sieve
      - traefik.tcp.services.sieve.loadbalancer.server.port=4190
      - traefik.tcp.services.sieve.loadbalancer.proxyProtocol.version=2
    networks:
      proxy:
        ipv4_address: 172.18.0.21

networks:
  proxy:
    external: true

traefik-compose.yml

services:
  traefik:
    image: traefik:latest
    container_name: traefik
    restart: always
    ports:
      - "80:80"
      - "443:443"
      # Mailserver
      - "465:465" # ESMTP submission, implicit TLS
      - "993:993" # IMAP4 secure, implicit TLS
      - "4190:4190" # sieve
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./letsencrypt:/letsencrypt
      - ./traefik:/etc/traefik
    networks:
      proxy:
        ipv4_address: 172.18.0.20

    environment:
      - CLOUDFLARE_EMAIL=MAIL
      - CLOUDFLARE_DNS_API_TOKEN=TOKEN
  certdumper:
    image: ghcr.io/kereis/traefik-certs-dumper:latest
    volumes:
      - ./letsencrypt:/traefik:ro
      - ./letsencrypt/dumped:/output:rw

networks:
  proxy:
    name: proxy
    ipam:
      driver: default
      config:
        - subnet: 172.18.0.0/16
          gateway: 172.18.0.1

traefik.yml

global:
  checkNewVersion: true
  sendAnonymousUsage: false  # true by default

api:
  # Dashboard
  #
  # Optional
  # Default: true
  #
  dashboard: true

providers:
  docker:
    exposedByDefault: false
    network: proxy
  file:
    # watch for dynamic configuration changes
    directory: /etc/traefik
    watch: true

entryPoints:
  http:
    address: ":80"
    http:
      redirections:
        entryPoint:
          priority: 1000
          to: "https"
          scheme: "https"
  https:
    address: ":443"
    http:
      tls:
        certResolver: le
  esmtp:
    address: ":465"
    proxyProtocol:
      trustedIPs: 
        - 172.18.0.20
        - 172.18.0.21
  imap-ssl:
    address: ":993"
    proxyProtocol:
      trustedIPs: 
        - 172.18.0.20
        - 172.18.0.21
  sieve:
    address: ":4190"
    proxyProtocol:
      trustedIPs: 
        - 172.18.0.20
        - 172.18.0.21

certificatesResolvers:
  le:
    acme:
      # tlschallenge: true
      email: "[email protected]"
      storage: "/letsencrypt/acme.json"
      caServer: "https://acme-v02.api.letsencrypt.org/directory"
      dnsChallenge:
        provider: cloudflare

Does this work as of current?

Yes, it should. I don’t think I’ve changed my config since then.