Here's just the first part. (Obviously I went thru and changed anything that referred to actual names, servers, IP addresses.)
Generating server: emailprotect.myorg.com
#< #4.0.0 X-Spam-&-Virus-Firewall; host hormel.ABCU.edu[recipient email server IP] said: 451 4.1.8 FAILED [xxx.xxx.xxx.xxx,PTR] see http://www.ABCU.edu/ir/emailreject.php?ip=xxx.xxx.xxx.xxx&code=DNS (in reply to RCPT TO command)> #SMTP#
I believe this never left our email server on premises as that is the generating server.
The code #188.8.131.52 means Other or undefined network or routing status and the
4.1.8 FAILED means no answer from host
The odd thing is it takes over 24 hours to get an undeliverable email notice though I've read that perhaps the server will try to resend it a certain number of times so perhaps the reason it takes so long?
tracert to the real recipient email server ip resolves to the correct name over 13 hops so that seems correct.
At this time I do not have administrative rights to the email server nor do I have access to the 3d party email protection software. (Ok, it's a well known company but didn't want to violate some policy somewhere.)
Am I on the right track? My supervisior is busier than a one armed paper hanger so it may be a while berfore I get to them.
Edited by BitMonk, 01 August 2014 - 03:10 PM.