All of that is irrelevant. Someone wants to send me a message. That message may or may not be legitimate. There is nothing in the contract of messaging someone

All of that is irrelevant. Someone wants to send me a message. That message may or may not be legitimate. There is nothing in the contract of messaging someone by email that says that I have to reply in any way, be it with an answer or with tracking information. There is in particular nothing that says that my email-reading software should go behind my back and send information back to the sender of the message. If it did that, I'd be furious. What you are suggesting does not fit in the medium of email, independent of the legitimacy or intentions of the sender.