I’m not sure what you even want then. If an email can’t be delivered you should get a kickback notifications saying it can’t be delivered. Though, that may depend on the email service.

Ans if you’re effectively looking for a read-receipt, I’m not sure why you wouldn’t want to be notified of it. I don’t want to have to manually check anything to see if there is new information to look at. An email may be overkill, but 🤷.