Mailman 3 SaaS

Experimental branch

We maintain the experimental branch in our fork of the official Mailman repository, which includes new features that are not yet (and may never be) part of the official codebase.

Gitlab.com/TheNewIT

The word "experimental" is used to emphasize that this branch has a smaller user base than the master branch and is therefore tested less extensively. However, we do our best to ensure that bugs do not linger in it.

Experimental branch powers the lists.mailman3.com installation.

Features

Fix crash on user/address deletion with preferred-address memberships

Deleting or unlinking a user's preferred address left behind membership records that crashed Mailman during message delivery and API calls. All code paths that remove a preferred address now properly clean up dependent memberships.

New dont_break_dkim setting for lists

This setting helps preserve DKIM signatures when DMARC mitigation mode is disabled.

Migration to email.message.EmailMessage

This improves compliance with modern email standards for encoding and security, eliminating errors like "Non-ascii sender address" or "InvalidMultipartContentTransferEncodingDefect".

To switch your installation to the experimental branch, please contact support.

What is Mailman?

GNU Mailman is a mailing list management software.
Mailman project was started long time ago before the Millennium.
Since its birth it has become the most intelligent tool for handling mailing lists ever.
Huge number of companies with Fortune 500 members among them have been using Mailman for years.
The new version Mailman 3 brings to us even better user experience and communication power.