You can literally invoke imapd over ssh and it will preauthenticate as the user that invoked imapd. I used to do this with PINE 20 years ago. Good luck getting any of the big MSPs to support it, though.
You can literally invoke imapd over ssh and it will preauthenticate as the user that invoked imapd. I used to do this with PINE 20 years ago. Good luck getting any of the big MSPs to support it, though.