One of the servers that is part of our out going mail relay (smtp.aa.net.uk or smtp.aaisp.net.uk) has just suffered from a disk problem.
We've taken this server out of the pool, and will take 10 minutes for the DNS to update.
If you have problems sending email, please try again in 10 minutes. If still not working, then it maybe that your email program has remembered the old server and may need to be restarted.
The server is rebuilding it's RAID. We'll leave it out of service for the time being whilst we investigate.
Email in the queue is being processed, no email has been lost.
Email service should now be OK.