Earlier quoted context omitted.
They're getting closer to public-key authentication, I guess that's good.
Ooooooo. Is there such a thing as SSMTP/SIMAP (i.e. something that is to SMTP/IMAP as SFTP is to FTP - i.e. an SSH-based thing that sends and/or receives mail to/from a mail server)? It'd be badass to be able to literally just use my SSH keys to authenticate when sending/receiving mail.
Edit: My setup with mu4e is described in more detail at https://defanor.uberspace.net/notes/email.xhtml