I had already done and been doing all the things you mentioned. However, after comparing the file that was working with the one that isn't, I decided that only difference was the form. I also noticed that when I pressed send, it immediately went to the thank you page, whereas the one that is working takes a half a second before going to the redirect page. That told me it wasn't really processing anything.
So I decided to blow away the form and recreate it and then add the UE email on top of the new form. Lo and behold...it worked. Things are working like a charm now. Somehow my form got screwed up or corrupted or something. But things work as expected now. Thanks for your help.
One last quick question though... do you guys recommend the PEAR email client over mail and if so, why? Thanks again.