i already configure EFA Server (Hyperv) the first config was correct( a little problems with DNS but already solved) i have my domain,i have a 3com tipping point as a firewall, i open the ports, if i direction the mail traffic to the EFA server, my mail server doesnt receive mails, if i put directly the mail traffic to my mail server i start to receive mails, i think i need something to cofigure but a cant find it.

My configuration:
Ingoing: internet-->Firewall--> Efa Server -->Exchange
Outgoing: User --> Exchange-->firewalla --> Internet
greetings.