This is a message from the BT Mail server. Usually it's only about a temporary problem. If you see the message, try what you were doing a second time.
If you get the error message again, please check our Service Status page to check that the problem is not a temporary fault affecting BT's mail servers.
Check online for broadband service problems in your area
Call our broadband service status line on Freephone 0800 169 0199