Status (by robm at Mon Mar 8 05:25 UTC)
The old web interface is currently maintained on 3 separate servers. Over the weekend, we re-installed one of those servers due to some data corruption that occured on it when it crashed. Unfortunately the re-install wasn’t 100% complete, and this caused some internal DNS failures. The result of this is that if you use the old web interface, and happened to get this problem machine as your web server (1 in 3 chance based on your IP), any sent email will have double bounced and disappeared. A copy will have been placed in your Sent Items folder, but the email was not actually sent.
We’ll work out which users were affected by this, and email them to let them know, and how they can resend their email.
This will only have affected some users (1 in 3 randomly based on your IP), only users that use the old web interface, and only users that have sent email in the last 21 hours.