I am having a small problem with my exchange server maybe you can help. Emails are going in and out nicely to all other domains, but i am having an issue with one domain. Every-time when i send emails to them i get this message. Your message did not reach some or all of the intended recipients. Subject: Test Email Sent: 5/28/2012 10:10 AM The following recipient(s) cannot be reached: admin@rejectingdomain.com on 5/30/2012 10:08 AM Could not deliver the message in the time limit specified. Please retry or contact your administrator. <mydomain.com #4.4.7> I have checked my domain and its not blacklisted, DNS is configured properly. External and Internal mails are moving smoothly, its only this domain that give me problem? What could be the issue? What am i missing?

Hi, Try to enable SMTP logging on the send connector and see if there is any trace of trying to connect to the remote domain. Leif

How about use other account (like Hotmail account) send email to that domain, can they receive your emails? If this issue still occur when you use Hotmail account, this may not your Exchange issue. If Hotmail account don't have this issue, I suggest you follow Leif's suggestion to check with smtp logs. Thanks, EvanEvan Liu TechNet Community Support