This is using MS Exchange 2003 server in w2k3 ad domain. Recently, few users told me that they got bounced message whenever trying to send to the recipient with error messages:
did not reach the following recipient(s):
firstname.lastname@example.org on Thu, 8 Sep 2011 18:31:00 +0800
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<mx1.def.com. #5.7.1 smtp;554 5.7.1 Client host rejected: cannot find your reverse hostname, [x.x.x.x]>
The error message said cannot find my reverse hostname? What can I do to accomplice this reverse hostname?