I am very happy to announce the release of GNU Mailman 3.0. Over seven years in development, Mailman 3 represents a major new version, redesigned as a suite of cooperating components which can be used to mix and match however you want. The core engine is now backed by a relational database and exposes its functionality to other components via an administrative REST+JSON API. Our new web user interface, Postorius is Django-based, as is our new archiver HyperKitty. The core requires Python 3.4 while Postorius and HyperKitty require Python 2.7. We also have a library called mailman.client, which works in both Python 2 and 3 and is the official Python bindings to the core's REST API. The mailman- bundler is a set of scripts that help building out a complete Mailman 3 system in Python virtual environments. There are tons of new features. See the detailed official announcement at https://mail.python.org/pipermail/mailman-announce/2015-April/000210.html What is GNU Mailman? GNU Mailman is free software for managing electronic mail discussion and e-newsletter lists. Mailman is integrated with the web, making it easy for users to manage their accounts and for list owners to administer their lists. Mailman supports built-in archiving, automatic bounce processing, content filtering, digest delivery, and more. Mailman 3 is released under the terms of the GNU General Public License, version 3. See the release notes, as well as links to download each component: http://wiki.list.org/Mailman3 You probably want to start with the bundler and let it grab and install all the other parts. More information is available at: http://www.list.org http://wiki.list.org http://launchpad.net/mailman #mailman on freenode mailman-developers@python.org Happy Mailman Day, -The Mailman Cabal Abhilash, Aurélien, Barry, Florian, John, Mark, Stephen, Sumana, and Terri