MailmanLists' servers are well maintained and are periodically taken offline for software upgrades - typically once a month for a few minutes. Any messages posted to an off-line server get queued and then delivered when the server is brought back online.

To be notified of upcoming changes and scheduled outages, please subscribe to notices (at)

Server Date/time (UTC) Expected downtime
Bissen, Luxembourg Sunday 23 September 2018 at 02:00 Less than 30 minutes
Sydney, Australia Sunday 30 September 2018 at 12:00 Less than 15 minutes
Singapore, Singapore Saturday 6 October 2018 at 14:00 Less than 15 minutes