Hope you are not replying to spammers. Just because you got a mail from a particular domain, it does not mean that domain is actually there. Mail headers can easily be manipulated. Do the usual who-is lookup (I use the tool samspade). If domain actually exist, get the technical person's email (from the whois data) and tell them you can't get to them via email. /Gill > -----Original Message----- > From: ajityadav [mailto:ajityadav@xxxxxxxxxxx] > Sent: Tuesday, December 07, 2004 6:18 PM > To: [ExchangeList] > Subject: [exchangelist] Unrouted mail > > http://www.MSExchange.org/ > > > > Hi Dear All > > I HAVE SOME PROBLE RELATED TO MAILS WHEN I SEND TO MAIL > ON SOME DOMAIN > LIKE @ABC .COM AND @XYZ.COM > THAT MAIL ARE RETRUN THE MASSAGE HAS FOUND UNROUTED PATH > AND SOME TIME DOMAIN NOT FOUND. BUT ALL DOMAIN IS GENUN AND > RECEIVED MAIL TO ALL THESE DOMAIN WHEREI GOT THIS MASSAGE. . > > > THERE HAVE DNS RELATED PROBLE AND WHAT PLEASE ADVICE ME > > > I HAVE EXCHNAGE 5.5 WITH WINDOWS NT4 > > > AJIT > > ------------------------------------------------------ > 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: ssgill@xxxxxxxxxxxxxxxxxxxx To > unsubscribe visit > http://www.webelists.com/cgi/lyris.pl?enter=exchangelist > Report abuse to listadmin@xxxxxxxxxxxxxx