Can't access Exchange OWA from Wireless Subnet - Firewall rule?

Based on your debug ouput

Your source IP is 10.10.94.187

But your eth0/1 is 10.11/24 so there's no zone match for the policy.

You'll need to adjust your eth0/1 vlan to accomodate the zone properly.

After hours of troubleshooting, I finally identified the culprit. I had a transposed a number in the IP address of my mailserver. (In the ScreenOS address list) My firewall rules were using the named address entry, so that explains why they wouldn't work, even when the rules were correct.

Rather embarassing, but I did want to post the solution in case anyone else encounters a similar issue. A big thanks (and +1) to @TheCleaner for his tips on debugging traffic flow! I am sure that will come in handy down the road.