"Since emails are encrypted by your browser and decrypted by the intended recipients, no one else can read them, not even Mailfence. This is called end-to-end encryption."
"That eliminates them as my primary application is Usenet and maling lists" That's incorrect. I'm using Protonmail right now and it also uses end-to-end encryption and my emails are encrypted on the server so that Protonmail can't read them either just like Mailfence. In order for emails to be encrypted in transit to the other party there has to be a successful encryption negotiation and key exchange. If that doesn't happen, the email isn't encrypted because the other party wouldn't be able to read it, so why send it.
