[Toreador]

This has happened to me twice now that I know of, once at the beginning of last year and once a few weeks ago. Both times it was while there were email problems ongoing.
I access my mail while away from home using webmail. So I knew that some emails had arrived, and even read one of them. A few hours later, when the problems were resolved, the new messages had all disappeared. I assume that they had restored from a backup of some sort and lost any data not included, but I'm just guessing.
In both cases I contacted NTL asking for an explanation, and in both cases they ignored me completely.