Yes, every other Admin sections work. Just the Email Config

Post a link to your "admin_config_email.asp" file in .txt format for us to take a look at. Sounds like it's corrupt or modified.

I have not made any mods to admin_config_email.asp or any other file. I have installed this forum on a Windows 2008R2 server running iis 7.5.

After further investigation I see a system event that is created when I enter the admin username and password after clicking on the Mail Server configuration.
A process serving application pool 'SnitzForum' suffered a fatal communication error with the Windows Process Activation Service. The process id was '3248'. The data field contains the error number.

Yes, Windows Process Activation Service is started.