I have a Fortimail appliance that currently relays mail for my Lotus servers.
I have built two new Exchange servers as part of a migration project.
On these Exchange servers I have configured a Send connect to point to the Fortimail IP and the scoping is *.mySMTPdomain.com
On the Fortimail on the Access Control tab I have added my two Exchange servers.
Now I can telnet on port 25 from my Exchange to Fortimail.
But I cant send mail from Exchange externally, after a time I get the following bounce back message - returned '550 4.4.7 QUEUE.Expired; message expired in unreachable destination queue. Reason: A matching connector cannot be found to route the external recipient'