We have exchange 2003, I am not sure what they have, their tech assures me its not their end. We can send to them without problems. She tells me that she gets an email 2 days later saying its been delayed too long. I have checked our firewall, and exchange log and their ip doesn't show up as incoming anywhere, so I am lead to believe there is some problem along the line, what test can I run to see where its stopping?
Test so far:
We cannot ping their server
ran dnsreport.com - our mail server checks out ok, as does theirs with the exception of "Mail server name in host"