I have a small installation of Filr (all on one box for 50 users max). Trying to set up postfix mail is causing a problem as port 25 outbound from filr appliance is blocked on it's firewall. BUT I cannot find where to change it.

As it is in our DMZ I am reluctant to open more ports inbound to relay off our groupWise server. Any ideas as to how to open the port on the Filr firewall?