I'll be taking the mailman service offline to remove a few mailing lists, and scrub some items from other lists. I've linked in all the associated tasks, with this as their blocker.
The following email was sent out regarding this work:
Mailing list maintenance window - 2015-05-19 17:00 UTC to 19:00 UTC
Please note that we will be working on a few open tasks for mailing list server maintenance, next Tuesday, May 19th from 17:00 to 19:00 UTC.
During this time, all mailing list traffic, as well as online archives, may become unavailable. Once the window has ended, all mail routing should resume normally, and any messages sent during the window will then be delivered accordingly.
All associated tasks and changes are linked from https://phabricator.wikimedia.org/T99098.
This mail has (initially) been send to all list administrators, and wikitech-l. Please feel free to forward to any other lists or parties that would need to know about this maintenance window.