why cant you set up your own email server in under 5 minutes on a vps server you paid for with crypto and a domain name and call it a day? you own the server and a such, you are certain only you can see your side of the email. then do whatever shiny PGP or whatever and you are good to go. why is this a problem?
i run a mailinabox for almost a year now. had initial trouble with gmail. now its all fine and i have no trouble connecting to anyone.
as i said, when you pay with crypto, the VPS provider has what data on you? you obviously wont use your real name to sign up for vps or domain so what can they give besides access to the server? even if that was done, won't you know?
Public facing SMTP, Tor hidden service for IMAP, all on a VPS and domain paid for with tumbled cc? Unless you worry about your ISP knowing you use Tor (there are some ways around that, kinda), I can't imagine how they'd DA you.
E: ... aside from some sort of Tor-based attack, of course.