If you’re unfamiliar with mailing lists, think of it like a web forum, but through email. You can also post through the web interface if you prefer.
We intend to use the list primarily for long-form discussion about policies, community development, and so on.
Why was the list down? We migrated from the Mailman 2 series to the Mailman 3 series of the software. It adds features like the web interface for posting, searchable archives, social logins, and much more, making the experience much more comparable to modern forum software.