No, that's not the point. It's not the plain text address info that matters but the sender (who sends you snail mail) matters. E.G. 123 Main St, Music City, USA

No, that's not the point. It's not the plain text address info that matters but the sender (who sends you snail mail) matters. E.G. 123 Main St, Music City, USA is public knowledge to all people touches your physical mails, but no one has the entire picture of all physical mails you are getting from in your physical inbox (shops, banks etc.), until now with Informed Delivery courtesy of USPS.