HiI am running Exchange 2000 and today got the following error when i tried to send an email to one of the accounts:The e-mail address could not be found. Perhaps the recipient moved to a different e-mail organization, or there was a mistake in the address. Check the address and try again. <Server> #5.1.7I looked in the MS Knowledge Base, but the article i found (ID 836563) did not seem to help as i am only running the one exchange server and 2000 not 5.5. The problem only appears to on the one account.Any help would be great!Oliver Mackie