We have add our own Exchange 2003 Server up and running for over a year now. In the last week or so more and more people have been complaining about email not be delivered to there recipients. The message that keep coming back is
The following recipient(s) cannot be reached:
[email protected] on 6/19/2007 5:51 PM
The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again. If it still fails, contact your system administrator.
Where 18.104.22.168 is our external IP address. I have looked all over the Internet and can’t seem to find an answer to this problem. Is there something that is setup wrong or is it just problems on the recipients ends.