Hi,
I also run Exch 5.5 with a firewall. (Symantec) Is it more effective to point the Exch server's gateway to the firewall as opposed to the same gateway that all the workstations/servers are pointing to? At the moment, all the workstations point to a router (172.29.180.8) and the exchange server points to the firewall (172.29.180.10). Recently I had changed this and pointed the Exch server to the same gateway as the other systems....every now and then I would get an undeliverable message (communications failure blah blah). It would then send on the next try. I have since changed to back to pointing to the firewall.
Any ideas why this would happen - sounds like a DNS problem...even though our exchange server is the primary DNS server and the gatway the 2ndary!
Cheers,
Julian