Mailadmin

GitHub address: https://github.com/aspettl/mailadmin

Mailadmin is a simple tool to manage email domains, accounts and alias addresses conveniently. It targets systems where there is only a handful of users who want to manage their own domains. It is not meant to be used by end users (those using the mailboxes) - however, there is an API for the Roundcube password plugin.

It was developed to manage a mailserver running with docker-mailserver. However, it could be used to produce configuration files for any mailserver setup, e.g. Postfix with Dovecot.

Features

• UI features
  • manage domains and domain aliases
    • support domain catchalls
  • mailboxes for end users
    • crypt-based password hashes
    • "Have I Been Pwned" password check
    • optional email forwarding
  • alias addresses
  • blackhole addresses
• multiple "admin" users
  • one user can manage only his or her domains
• config export to docker-mailserver
• Roundcube password plugin API

Screenshots

• Manage Domains
• Manage Accounts

Docker images

Prebuilt images for the latest commit of the main branch are available via DockerHub:

• aspettl/mailadmin:edge
• aspettl/docker-mailserver-configreload:edge

Releases are pushed with the version number as docker image tag.

Start/try out locally

Requirements:

• Ruby (see .ruby-version) and bundler for bundle install to install all dependencies.
• MariaDB or MySQL database server should be already running. The connection is established via the socket /var/run/mysqld. Expected user name is mailadmin, password empty, all privileges for mailadmin_-prefixed databases.

Create the database via rails db:create, rails db:migrate to apply migrations, rails db:fixtures:load for some example data, rails server to start and log in at http://localhost:3000 with "alice@example.com" and password "test".

Build docker images

You can use docker-compose build to build all docker images.

Local docker-based staging environment

Use docker-compose up -d and docker-compose down. Have a look at the configuration in docker-compose.yml and the Dockerfile defaults for environment variables.

Note: When the container starts, it will automatically apply database migrations.

User setup in production environment

There is no UI to manage admin users.

To create a user, "docker exec" or "kubectl exec" into the container and run bundle exec rails console. Then, use

User.create! do |u|
  u.email    = 'yourname@example.com'
  u.password = 'passwordwithatleast10chars'
end

Note that every user is allowed to create new domains. There is only a check that new subdomains must not belong to a domain of a different user.

Integration into docker-mailserver

See docker-compose.yml and integrations/docker-mailserver-configreload.

Integration into Roundcube

Roundcube will typically connect via IMAP to docker-mailserver and not need any special configuration. The only exception is when Roundcube users should be able to change their account passwords, see integrations/roundcube-password-plugin.