Clete, you don't list an e-mail in your profile either. A new contact may expect to see one listed there. One that matches the one in the email you sent them.
Someone could claim to be me in a random email to you, but that would not verify it's really me.
However ,if you see an email in my profile that matches the request to respond, you be pretty sure it's really me and not a scammer claiming to be me (or all my online accounts got stolen).
I'm not saying that no address listed here is the cause; but it might be. I might not have answered you either. To be honest. ....likely not unless we had a bit of posting contacts before.
Maybe start a new email account just for public contact, make your normal account able to read the new account, but give the new account no power over the normal account. 😉 List it just while "shopping", etc. and pull it off the rest of the time if you want to; but super-spam hasn't hit me it years now.
The little spam I see anymore is too sparse to notice really.
...(insert obligatory 2020 Monty Python Spam joke here 🙃)
