codingjoe/the-box-smtp:latest

name: containers
networks:
  app:
    internal: true
    name: containers_app
  app-wan:
    name: containers_app-wan
  caddy:
    external: true
    name: caddy
  smtp-wan:
    name: smtp-wan
services:
  smtp:
    container_name: smtp
    deploy:
      mode: global
    domainname: ${HOSTNAME}
    environment:
      LOG_LEVEL: info
      NETWORK_INTERFACE: eth1
      ONE_DIR: 1
      PERMIT_DOCKER: connected-networks
      POSTFIX_INET_PROTOCOLS: ipv4
      SMTP_ONLY: 1
      SSL_TYPE: ""
    healthcheck:
      interval: 10s
      retries: 5
      start_period: 30s
      test: ss --listening --ipv4 --tcp | grep --silent ':smtp' || exit 1
      timeout: 3s
    hostname: smtp
    image: ghcr.io/docker-mailserver/docker-mailserver:15.1.0
    labels:
      - dev.dozzle.group=the-box
    networks:
      app:
        interface_name: eth1
      smtp-wan:
        interface_name: eth0
    restart: always
    stop_grace_period: 1m
    volumes:
      - source: smtp-data
        target: /var/mail
        type: volume
        volume: {}
      - source: smtp-state
        target: /var/mail-state
        type: volume
        volume: {}
      - source: smtp-config
        target: /tmp/docker-mailserver
        type: volume
        volume: {}
      - bind:
          create_host_path: true
        read_only: true
        source: /etc/localtime
        target: /etc/localtime
        type: bind
  web:
    depends_on:
      smtp:
        condition: service_healthy
        required: true
    deploy:
      mode: replicated
      replicas: 2
      resources:
        limits:
          cpus: "2"
          memory: 512M
      restart_policy:
        condition: on-failure
        delay: 5s
        max_attempts: 3
        window: 120s
      update_config:
        delay: 1m
        failure_action: rollback
        monitor: 1m
        order: start-first
        parallelism: 1
    environment:
      - HOSTNAME=${HOSTNAME:-localhost}
      - PORT=${PORT:-8000}
      - EMAIL_URL=smtp://smtp:25/
    image: traefik/whoami:latest
    labels:
      - caddy=${HOSTNAME:-localhost}
      - caddy.reverse_proxy={{upstreams ${PORT:-8000}}}
      - caddy.reverse_proxy.lb_policy=round_robin
      - caddy.reverse_proxy.health_uri=/
      - caddy.reverse_proxy.health_headers.X-Forwarded-Host=${HOSTNAME:-localhost}
      - caddy.reverse_proxy.health_headers.X-Forwarded-Proto=https
    networks:
      app: null
      app-wan: null
      caddy: null
    stop_grace_period: 1m
volumes:
  smtp-config:
    name: containers_smtp-config
  smtp-data:
    name: containers_smtp-data
  smtp-state:
    name: containers_smtp-state