I am attempting to troubleshoot an email problem. Our company is trying to send to another company and the email will stay in the Exchange queue and we will receive a delivery delayed notification from our exchange server.
- We have a Exchange 2007.
- The destination email is Exchange 2003 Sp2, with a firebox as their router.
- I have tested email to their location from yahoo and other domains - these were successful.
I was following instructions on testing telnet to port 25 and have determined that I can telnet to port 25 on the destination from an XP or 2003 server, but I cannot telnet to port 25 from a Vista or 2008 Server.
Any insight as to why the telnet in these cases fail?
Any thoughts on why we may be receiving the delivery notification delayed?