Outlook 2000 email error

  Iceman56 22:33 03 Jul 03

I have recently upgraded to Outlook 2000 and now have an error message when trying to send email, all incomming email works OK. But it will not send.
The error Mesage is as follows

The message could not be sent because one of the recipients was rejected by the server. Server Response: 533 sorry that domain isn't in my list of allowed rcpthosts (#5.7.1)',(Account: giointernet smtp: 'smtp.giointernet.co.uk',Error Number: 0x800CCC79)

I have checked the Knowledge base and have found something similar for 2000 server, but non of the solutions work. (XCON: NDR with Error 0x800CCC79 When You Send SMTP Mail from Outlook Express)

Can anyone help please.

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