The other domain is doing a reverse lookup on your domain and it is failing.
----- Original Message ----- From: "roger" <[EMAIL PROTECTED]> To: "Exchange Discussions" <[EMAIL PROTECTED]> Sent: Thursday, December 20, 2001 9:33 AM Subject: Cant resolve some mails > Hi > > I have a simple domain consisting of One Win2k Domain controller with > Exchage 5.5, all has the latest service packs. > > I am finding that certail mails when sent from my users are getting stuck > in the Intertnet mail service\Queeus Tab, when i check the detail they are > as follows : > > [451 4.1.8 Domain of sender address ????.com does not resolve. > > Cheers > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]