"We have scheduled an upgrade of mailman (https://lists.wikimedia.org) for:

Wednesday, September 9, 2015 at 2:00:00 PM UTC ( 7:00 AM PDT, 16:00 CEST)

The scheduled mainteance window is 4 hours (or less).

During this time please expect all the mailing lists (web interface and email) to be down."

Full details at: https://lists.wikimedia.org/pipermail/listadmins/2015-September/000077.html

Regards, Richard.