Question : Having mail server go out a specific SonicWALL interface?

Hey guys, quick question.

I have a SonicWALL NSA240 configured with 2 WAN interfaces (X1 for general internet traffic, and X2 for our dedicated bandwidth). Both have static IPs.

We have a DNS record pointing to the X2 interface. The domain name is for our mail server (Exchange 2003). I have basic load balancing implemented and outgoing traffic defaults out X1.

This is a problem because when the mail server makes a outgoing connection to another mail server, it is using the X1 IP address which does not have a DNS record, and sometimes the other mail server will reject us because it can't resolve a domain name. How do I configure my SonicWALL to send all traffic from our mail server out the X2 interface?

Answer : Having mail server go out a specific SonicWALL interface?

OK...I'm stupid.  You want to create a route not a firewall rule.  Sorry....just finished a question about fw rules.  Go to Network > Routing.  Add a route and you'll see a window similar to what I've attached.  You can either select Any for the service or particular to Exchange traffic.  Select the interface for both Gateway: and Interface: