[jasonmunro]

JMAP actually does support replacing both. My next TODO item for Cypht is integrating SMTP support with JMAP.

[Mailtemi]

Just curious, did you build Cyrus yourself or there is beta server already?

[jasonmunro]

I checked out the git source and built it from there. It was non-trivial to get it built and configured properly for JMAP, but I wanted the latest as the spec is still in flux.