Outgoing mail server is offline
I have an Imac, OSX 10.7.1 Lion and Mail V5.0. It's all been running swimmingly but now my outgoing mail server (BT) is saying it's offline in accounts and I can't send mail. Anyone found a solution to this, I know it's been a problem for a long time but thought it had been resolved.
iMac, Mac OS X (10.7.1), Mail