The problem with the JMAP standard is that nothing seems to actually implement it. There is their proxy which was built in like a week and not updated and Cyrus

The problem with the JMAP standard is that nothing seems to actually implement it. There is their proxy which was built in like a week and not updated and Cyrus. The latter which I couldn't (not for lack of effort) implement, and went back to dovecot which doesn't have an implementation.