I’m just now catching up and trying to understand your point in this(?) If I google Univec, the website comes up. The contact address is different than what you wrote down. Giving you the benefit of the doubt, I’m assuming that’s an address he may have had in the past?

However, I could write down your alias with any address I want to make up in the send to part. As long as I put my return address and drop it in any mailbox, it’s going to come back to me as undeliverable.