I read your post in full, about three times to fully comprehend your issue, before I posted. The non-delivered email is baffling.
However, without knowing your setup it is somewhat impossible to troubleshoot. Perhaps you didn't read my post in its entirety.
Without knowing that, I agree with the others as well. Delete all BIS accounts for 24 hours and try again. Not much else you can do.
All that said--you will be one of very very few who are actually missing email delivery especially after an extended period. My first reaction is that something particular on your account or setup is screwy.