Thanks for the video cb22, it looks really good

Unfortunately, other than possibly testing, I don't think I would be able to contribute much, mostly due to lack of time (as well as lack of experience with Python...)

In any case, you might consider splitting the daemon functionality and the GUI (which you probably have), so that e.g. the GUI might also be able to work with mbox and/or Maildir structures (like pine/alpine or mutt) as well as with the sqlite database.

This way one would use not only your daemon but also offlineimap as a back-end, or the other way around, use your daemon with e.g. alpine as GUI.

I'm not asking you to focus on this now , but maybe you can keep in mind so that it can be implemented in the future without having to re-code everything?

Cheers.