On Sat, Apr 22, 2017 at 08:59:35PM +0100, Alain Williams wrote:

Apologies for poor mail service today. There have been disk problems. The hosting company has been working since this morning to fix things - but there are still some unexpected down-time/reboots.

Thanks for your patience

The machine is back up ... not quite 100% - there may be some bounces later.

One of the main data stores became corrupt, I had to completely wipe and restore from backup. This affected all email and mail lists. You might find that some mail sent in the last 18 hours has got lost.

If really interested, some more background to what went wrong here:

https://status.bytemark.org/issues/170