This isn't true for the vast majority of consumers. For example, the IP address of the SMTP server will carry a reputation. ISPs will block IPs that are untrust

This isn't true for the vast majority of consumers. For example, the IP address of the SMTP server will carry a reputation. ISPs will block IPs that are untrusted and your message will get "dropped" before you receive it. You can run your own server and just let everything through but we're dangerously close to the "just build your own facebook if they censor you" rebuttle. If we are going to let the government declare this a form of illegal censorship the email email trust framework is going to break down. Lee and his ilk are playing with fire.