Dear listadmins, Please be aware for potential downtime on lists.wikimedia.org tomorrow, 2021-07-29. When: 15:00 UTC, for about 30 minutes (unlikely to take that long) What: Incoming email may not be able to reach the lists.wikimedia.org server and may need to be retried (usually automatic). Outgoing mail will be delayed until the maintenance finishes. Why: The Network Operations team performing maintenance and will bring all network traffic to lists.wikimedia.org to a complete stop. Most likely this will take 1 second and no one will notice, however if something goes wrong it will take down mailing lists, hence the notification. More technical details are available at <https://phabricator.wikimedia.org/T286032>. Let us know if you have any questions. Please also forward/cross-post this message as needed. Thanks, -- Kunal