Mailauth

Mailauth is a Mailbox Manager which enables you too select between your Mailboxes and authenticate with your Mailserver, like mailcow

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Getting Started

Get the latest version of the docker-compose.yaml file:

---
services:
  mailauth:
    image: ghcr.io/codeshelldev/mailauth:latest
    container_name: mailauth
    ports:
      - "80:80"
    env_file:
      - .env
    restart: unless-stopped
    networks:
      mailauth:
        aliases:
          - mailauth

  mongodb:
    image: mongo:latest # Use arm64v8/mongo for ARM Architecture
    container_name: mailauth-db
    volumes:
      - db:/data/db
      - ./init-mongo.js:/docker-entrypoint-initdb.d/init-mongo.js
    env_file:
      - .env
    networks:
      mailauth:
        aliases:
          - mongo
    restart: unless-stopped

  redis:
    image: redis:latest
    container_name: mailauth-redis
    command: ["redis-server", "--requirepass", ""]
    env_file:
      - .env
    networks:
      mailauth:
        aliases:
          - redis
    restart: unless-stopped

networks:
  mailauth:

volumes:
  db:

Setup

Mailauth currently works by modifying the email claim during Token Exchange and Userinfo, this means that you will have to use a IdP (like authentik).

Create a .env file inside of you docker-compose.yaml directory and copy the template below

# Mail

# Get from your IdP (for your mailserver)
MAIL_CLIENT_ID=
MAIL_CLIENT_SECRET=

MAIL_AUTHORIZATION_ENDPOINT=
MAIL_TOKEN_ENDPOINT=
MAIL_USERINFO_ENDPOINT=

MAIL_REDIRECT_URIS=https://mailauth.domain.com/oauth/mail/callback,https://mailauth.yourdomain.com/oauth/mail/callback
MAIL_CALLBACK_URIS=https://mail.domain.com,https://mail.yourdomain.com # This is your mailservers oauth callback url

# App

# Get this from your IdP (for mailauth)
APP_CLIENT_ID= 
APP_CLIENT_SECRET=

APP_ISSUER=
APP_AUTHORIZATION_ENDPOINT=
APP_TOKEN_ENDPOINT=
APP_USERINFO_ENDPOINT=
APP_LOGOUT_ENDPOINT=

APP_REDIRECT_PATH=/oauth/app/callback

# DB

MONGO_INITDB_ROOT_USERNAME=admin
MONGO_INITDB_ROOT_PASSWORD=SECURE_ROOT_PW
MONGO_INITDB_DATABASE=mailauth

MONGO_USER=mailauth
MONGO_PW=SECURE_PW

# ---- #

REDIS_PASSWORD=SECURE_REDIS_PW

# General

SESSION_SECRET=SECURE_KEY # Gen with openssl

HOST=https://mailauth.domain.com

PREFIX=/ # Optional

DB_HOST=mongodb://::27017/
REDIS_HOST=redis://default::6379

Now you need to setup a Oauth Authentication Method in your mailserver, but instead of using your IdP's endpoints you use:

• /oauth/mail/authorize
• /oauth/mail/token
• /oauth/mail/userinfo

And for the Redirect Uri set it to the one from your .env file.

Next create init-mongo.js in your working directory:

// This is only for initializing the db and creating the mailauth user

db = db.getSiblingDB("mailauth")
db.createUser({
	user: "mailauth",
	pwd: "SECURE_PW", // This should match the one in your env
	roles: [{ role: "readWrite", db: "mailauth" }],
})

Reverse Proxy

When working with Oauth2 and Auth in general it is recommended to be sure to use secure connections, here you will see a Reverse Proxy implementation with traefik:

---
services:
  mailauth:
    image: ghcr.io/codeshelldev/mailauth:latest
    container_name: mailauth
    labels:
      - traefik.enable=true
      - traefik.http.routers.mailauth-secure.entrypoints=websecure
      - traefik.http.routers.mailauth-secure.rule=Host(`mailauth.domain.com`)
      - traefik.http.routers.mailauth-secure.tls=true
      - traefik.http.routers.mailauth-secure.tls.certresolver=resolver
      - traefik.http.routers.mailauth-secure.service=mailauth-svc
      - traefik.http.services.mailauth-svc.loadbalancer.server.port=80
      - traefik.docker.network=proxy
    env_file:
      - .env
    restart: unless-stopped
    networks:
      mailauth:
        aliases:
          - mailauth
      proxy:

  mongodb:
    image: mongo:latest # Use arm64v8/mongo for ARM Architecture
    container_name: mailauth-db
    volumes:
      - db:/data/db
      - ./init-mongo.js:/docker-entrypoint-initdb.d/init-mongo.js
    env_file:
      - .env
    networks:
      mailauth:
        aliases:
          - mongo
    restart: unless-stopped

  redis:
    image: redis:latest
    container_name: mailauth-redis
    command: ["redis-server", "--requirepass", ""]
    env_file:
      - .env
    networks:
      mailauth:
        aliases:
          - redis
    restart: unless-stopped

networks:
  mailauth:
  proxy:
    external: true

volumes:
  db:

Usage

When authenticating via mailauth you get redirected to your actual IdP then to /select, where you will be able to select your mailbox, mailauth changes the email claim and now you're logged in.

Contributing

Found an Issue or want to see something implemented into Mailauth? Open up an Issue or start a Pull Request!

But always be respectful and patient, we are all volunteers after all.

Supporting

Found this Project useful? Let others know about Mailauth by ⭐️ this Repo!

License

MIT