Mailman3 deployed to production

Originally posted on mastodon.technology.

The "soon" in "#Wikimedia will upgrade to #Mailman3 soon" has finally arrived!

https://lists.wikimedia.org/postorius/lists/

We'll start migrating lists in a few days, some more details at: https://lists.wikimedia.org/pipermail/wikitech-l/2021-April/094459.html (hopefully one of the last pipermail links I share)

Shoutout to @ladsgroup for instigating this and really driving it forward!