Hi, As i'm getting NDR as the following, Subject:****** Sent: 7/21/2004 3:00 PM The following recipient(s) could not be reached: fb92fd3bd37ca648b872a8adf6387741@xxxxxxxx on 7/21/2004 3:17 PM The destination server for this recipient could not be found in Domain Name Service (DNS). Please verify the email address and retry. If that fails, contact your administrator. <xxx.yyy.com #5.4.0> Can anybody knows what is this NDR to adsi.dat. I verified my active directory integrity, exchange database integrity, no errors in that one.and we're not using any DNS server just relaying thru ISP's DNS Servers. Any Help... Regards, Ahamed ________________________________________________________________________ Yahoo! India Careers: Over 65,000 jobs online Go to: http://yahoo.naukri.com/