Where abouts is the recipient you are trying to send this email to, is it external domain. By the looks of it adsi.dat is not a valid domain name, it will have dns records so you will never be able to send mail to it. Unless of course its an internal domain of yours, which I doubt Greg Mulholland Krystaltek Solutions greg@xxxxxxxxxxxxxx www.krystaltek.com -----Original Message----- From: ali ahamed [mailto:saliahamed@xxxxxxxxxxx] Sent: Wednesday, July 21, 2004 7:45 PM To: [ExchangeList] Subject: [exchangelist] getting NDR to adsi.dat http://www.MSExchange.org/ 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/ ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: gmulholland@xxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist