SMTP and DNS error

I would like to know how to resolve the event id 2012 and 2013 on a Windows 2003 running Exchange 2003 Enterprise.

“SMTP could not connect to any DNS server. Either none are configured or all are down.
By default Windows 2003 uses UDP for DNS queries.”

Any help is greatly appreciated.

Thank You
Drea

Does anyone know how to fix this problem.