Status (by robm at Wed Feb 3 04:51 UTC)
A fix we rolled out about 3 hours ago unfortunately introduced a bug we hadn’t detected before the rollout. The result of the bug was that the web interface was down for about 5 minutes, and also pop retrieves from external servers (via Pop Links a user has setup) were failing for about 1 hour.
The pop retrieve failures were not correctly reported, and instead an "empty" message was delivered to users mailboxes. However no messages were lost in this process, and after the problem was fixed, the messages that previously generated an "empty" message were correctly retrieved.
To avoid confusion, we’ve cleaned up all the "empty" messages from users folders, since the messages contain no information and are just confusing to users now that everything is working again fine and no messages or data were lost.
