Parts of Pipex's POP3 email system went down yesterday and as of this morning does not appear to be fixed yet. This morning I logged onto to their website and found a link I hadn't seen before "To see if there are any problems with the Pipex Service, please click on this link.", sounds useful... Unfortunately clicking on the link only brings up a 404 - "Not Found - The requested URL /service-status/ was not found on this server."
Pipex as on the ball as ever it would appear.