Will misspelled email address stop notification process?

We received a registration in which the registrant misspelled her own email address. Her PayPal payment went through OK (using CC there doesn't involve the email address), and her registration details show up in the Entries list, showing the misspelled email. Presumably she received no confirmation email because of the misspelling, but we did not receive a notification email either (at any of 4 email addresses set up to receive reg notifications).

So is it possible that when a registrant misspells their email address and you receive a bounce, that the normal notification to admins is not sent? If so, could that be corrected (perhaps WITH a bounce error notification?)

We have all the email addresses on one line in the notifications setup (six of them, actually, not four, I wasn't remembering right). No BCC or routing.

We tested this the same way you did, and received an admin notification. We expect a lot more registrations, so we'll keep an eye on this to see if it happens again.

Just updating: this happened again just now. A person had registered, and entered their email with domain name state.us.vt, instead of the correct way: state.vt.us. Before we noticed that was the problem, we tried multiple "Resend Notifications" including just admin, not user notifications. Nothing went through, not in spam box, not in inbox. But as soon as we edited the email address to the correct domain and resent notifications to all, bingo, they went right through.

So where is this getting held up? Would it be a Bluehost thing where once they ID the email address as invalid because of a bounce from the user notification, they will not send out anything with that send address? Would it be better for us to use our own address as the admin notification send address?