How I wish spam was handled: 1. Any email that isn't signed with DKIM is blocked (having a signature specific to the source email address would be better, but

How I wish spam was handled: 1. Any email that isn't signed with DKIM is blocked (having a signature specific to the source email address would be better, but that is probably too much to ask for) 2. If the sender isn't in your contact list, block it, or at least mark it as spam. 3. Have an easy way to add new entries to you contact list, maybe a new url scheme similar to mailto:? So that it reduces the friction of say getting a confirmation email when signing up for something, or making sure you get emails from a new acquaintance. It would probably be good to have a way to add a full domain to the allowlist as well. But that would make selling/sharing email addresses a lot less valuable, so there might be some resistance to that from marketing and adtech.