I think this would work, question is what’s the market and does the product fit? If there’s a (potential) user base I’ll jump in a build with ya!

I think the market is:

    1. anyone who wants a clean inbox -- maybe less profitable
    2. any company that wants better protection against phishing attacks -- maybe more profitable
    3. Edit to add: someone pointed to https://www.mailinblack.com/ I don't speak French, but that's apparently a company that (somehow) provides a service similar to the description here to high-profile targets.

If the skateboard version of this seems technically do-able without having to convince the entire world to switch to a new protocol I'd be happy to jump into a google doc to noodle it further.

On the surface it seems like:

    1. it would have to rely on email addresses alone -- I don't know another way to transmit information from sender to receiver that fits within current "what's your email?" standards.
    2. it would have to have a sparse enough address space that accidental collisions are unlikely -- so maybe 8 alphanumerics for ~41 bits?

But if you have other ideas I'd love to hear them -- griping about email has been a thing of mine for 20 years...