News for hackers. Stuff that matters.
Re:JMAP: A modern, open email protocol by greggyb on Monday May 06, 2019 @05:53PM (#19844293)
I think their goal is to have transport layer be a pluggable subsystem, divorced from their request-response protocol.

They even essentially say that HTTP is not necessary to their protocol, so I think it's pretty apparent that HTTP is a utilitarian choice, but they're not trying to build email-over-http.

Re:JMAP: A modern, open email protocol by specialist on Tuesday May 07, 2019 @05:12AM (#19847716)
”pluggable subsystem”

SOAP had same rationalization.