Actually, I think I figured out where it logs to:
(Guess I should've looked a bit harder before posting!)
Regardless, the root cause of why my report isn't being e-mailed has to do with the "Reply E-mail" field being empty. This is true; although the reason appears to be that the field isn't being saved. The following post is where my pain is:
There is also sendmail.log in the managmentsuite folder, but i think that is just for alerting.