Comment 2 for bug 1609516

Description of problem:

Mailman 3 is really a suite of 5 tools:

 * The core, which provides the mail delivery engine, the unified user
model, moderation and modification of email messages, and interfaces to
external archivers;

 * Postorius, our new Django-based web user interface for users and list
   administrators;

 * HyperKitty, our new Django-based web archiver, providing rich access
to the historical record of mailing list traffic;

 * mailman.client, the official Python bindings to the core's REST API;

 * mailman-bundler, a set of scripts to make it easy to deploy the full
   suite inside Python virtual environments.

What's new about Mailman 3? Well, lots! Some highlights include:

 * Backed by a relational database;

 * True support for multiple domains, with no cross-domain mailing list
naming restrictions;

 * One user account to manage all your subscriptions on a site;

 * The core's functionality exposed through an administrative REST+JSON
API;

 * All passwords hashed by default, and no monthly password reminders!

 * Users can post to lists via the web interface;

 * Built-in archive searching!

and more. Tons more.
URL: https://www.gnu.org/software/mailman/