Comment by ccamrobertson

I think a lot of these concepts are fun/interesting, but I like that email today functions more like a mailbox than WhatsApp or Telegram. Whilst digital (or paper) spam is obnoxious I dislike the idea of binning every sender into a "unread" box until I approve them. I miss unreads all the time across apps like X and Telegram.

As a first step I would focus on something like broad S/MIME support. Unfortunately I suspect that the biggest email providers are disincentivized from doing this as it would disrupt their business models.