I have an Exch2003 server on W2K3 server which has been operating as is for years. We are currently in the process of testing Exch2010 (on W2K8 x64) server with a view to migrating our mailboxes over to it.
The new E2K10 server is on line and working well. I have transferred my own mailbox to it for testing. To get it to send email through our current E2K3 server (which has GFI and email signature software on it) I created a send connector specifying the E2K3 IP address as the smart host and '*' as address space.
I tested this yesterday and it seemed fine but now all external mail instead of leaving the organization from the E2K3 server is getting routerd to the E2K10 server and sitting idle in the submissions Queue. This is the error I am getting.
A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients. Contact your administrator.
<servername.domain.com #5.4.6 smtp;554 5.4.6 Hop count exceeded - possible mail loop>