Proton if you don’t know how to set up your own email service, your own email service if you do. It’s surprisingly easy to get your own email. HostGator even gives you free email services if you buy hosting for a domain. Just register your domain, point the DNS at HostGator, set up emails through cpanel, and use the FairEmail client to access your server. Easy peasy! Absolutely zero prying eyes, you have full control, and you get an apache server node as a bonus.