I installed my first Exchange 2007 server into my Exchange 2003 organization. i moved over a test mailbox and am able to send emails to the users in the 2003 server and to my gmail account but when replying to the email it bounces back to me
here is the message:
Your message did not reach some or all of the intended recipients.
Subject: testing from 2003 to 2007
Sent: 10/23/2008 10:55 AM
The following recipient(s) cannot be reached:
test on 10/23/2008 10:55 AM
You do not have permission to send to this recipient. For assistance, contact your system administrator.
<MAIL.domain.com #5.7.1 smtp;550 5.7.1 Unable to relay for email@example.com>
note: MAIL is my exchange 2003 server
thanks for your help Experts