E-Mail Functionality Still Missing In iOS

I've been looking to replace my encrypted e-mail provider, but looking at the still missing folders (archive, junk etc.), lack of e-mail signature and the ability to send encrypted/timed e-mail to non-MySudo users is preventing me from using this for anything more than "throwaway" e-mail accounts. 

These request are currently on the feature request list and are high ranking but still not implemented. The folder feature request has been on the list over one calendar year. I get the focus is on Android but please do not forget the iOS version still has needed functionality.