The GNOME Project is closing all its mailing lists
The GNOME Project is preparing to shut down its mailing lists due to problems maintaining the project's GNU Mailman instance - which relies on Python 2 - and a lack of moderators.
The community's leaders maintain a substantial selection of mailing lists, hosted via the GNU Project's Mailman tool. It also hosts its own instance of the Discourse web forum tool, notably also used by Canonical to host the official Ubuntu forums.
That's going to change, and very soon: at the end of this month. Announcements on several of the lists, such as here on the list for the Evolution email client, state that the lists are closing down, and discussions must move to Discourse.