I just need to confirm what I am think since this I am only at mid level with exchange. I have an invidual that here that sent and e-mail message that he was able to send to before that received and NDR that states.
External} on 2/17/2009 5:12 PM
Your mail system could not find a way to successfully communicate with the destination system. Please notify your administrator.
<FS-Mail.ERB.local #5.5.2 smtp;502 5.5.2 Error: command not recognized>
He was e-mailing firstname.lastname@example.org
When looking at the mx record I saw the following.
5 smtp.perimeterco.com 22.214.171.124 86400
6 smtp2.perimeterco.com 126.96.36.199 86400
7 mailhost.eastriverbank.com 188.8.131.52 86400
10 mail28.ixwebhosting.com 184.108.40.206 86400
I tried telneting into each one to test but couldnt even get a helo response. The mailhost.eastriverbank.com doesnt even seem to exist.
Any and all help is appreciated.