My user try to send mail to one recipient, and get the replied mail as follows:
Your message did not reach some or all of the intended recipients.
Subject: FW: GSI Executive Search Terms of Business
Sent: 8/19/2010 11:06 AM
The following recipient(s) could not be reached:
firstname.lastname@example.org on 8/19/2010 5:10 PM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<myexchange.email.com #4.7.1 smtp;450 4.7.1 Client host rejected: cannot find your reverse hostname, [a.a.a.a]>
Any thing wrong with my reverse IP?