Tech landscape has put a screen in every hand, net could become decentralized with the correct hardware, email does not have built-in spam prevention like coin,

Tech landscape has put a screen in every hand, net could become decentralized with the correct hardware, email does not have built-in spam prevention like coin, many factors encourage the idea that e-mail has a supercessor lurking undiscovered or unimplemented. So I'm wondering what it looks like, or what its features would be, or how we would build e-mail if we were tasked with it today a'fresh.