Emails stuck in que on SBS2003

[Mark M]

Emails havent been sending so had a look in the Exchange system manager and under servers and Queues the SmallBusiness SMTP connector - smtp.ukadsl.eng.net state reads Retry.

When you click on it the additional que information reads - The connection was dropped by the remote host.

Any ideas of what I can do next?

 

[Mark M]

I got 220 smarthost01.eng.net ESMTP Ready. Wed, 13 Oct 2010 14:40:16 +0100

Havent a clue how to change anything to do with the DNS sadly.

Is there any reason it should have just stopped working?