I am uesing Exchange Server 2003 with service pack 1. I am facing a problem with onlycouple ofdomains when my users send any message to thesaid domains it did not deliver and whenI check the in queues in the system manger itshows the color of the thoses domin folder blue and on the status bar shows the message that "Unable to bind to the destinaion server in DNS" while the messages to yahoo or other domain are delivering successfuly. What should be the problem and few days back it was working nice even I did not update and make any changes in the server. Please help me in this regard.

Are you using a Windows 2003 serve as DNS? http://support.microsoft.com/kb/828731/en-ushttp://support.microsoft.com/kb/828263/en-us /Lasse