You can find it on Facebook (I don’t have the link right now, because I’m not using Facebook), but it’s somewhere here on the forum, and I assume Facebook also supports searching for ‘eM Client’.
The full list of features has not been released yet, but the upcoming version should include conversation view, delayed send and many other features.
However please note it’s release is nowhere near yet, so please be patient, you’ll get all the information when the time is right.