Every 5-15 minutes or so my application log is flooded with this error or email address's just like it.
Time: 4:24:32 PM
A non-delivery report with a status code of 5.4.0 was generated for recipient rfc822;jnt4q3108gptq@mail.
.com (Message-ID <MAIL2KgFaRrTr8zo6uA00003b
Causes: This message indicates a DNS problem or an IP address configuration problem
Solution: Check the DNS using nslookup or dnsq. Verify the IP address is in IPv4 literal format.
For more information, click http://www.microsoft.com/contentredirect.asp
I have enabled filtering on recips not in the directory on ems and applied it on the smtp virtual server. I am also running interscan message security for spam and such. Dont know if that would be causing the problem but i doubt it. also made sure my server is not open to relay. someone help :)
I also ran a virus scan and found no virus infections, and i disabled allow authenticated users to relay regardless.