This kind of works. But also realize that if your email makes it into their contacts, then phone apps will harvest this. Things like WhatsApp or LinkedIn will d

This kind of works. But also realize that if your email makes it into their contacts, then phone apps will harvest this. Things like WhatsApp or LinkedIn will definitely harvest these so it’s not nearly as secure as you believe. You could have double indirection where you create a secret email and give everyone a second secret email and forward all emails from there.