This really is a very nice email Client. After a long journey through Apples Mail and Thunderbird I decided over a year ago to stick with GyazMail and never had a Problem.
It`s fast, clean, simple and has everthing you need (except overbloated presets for ugly HTML emails).

Apple Mail crashes too much and has security Issues every now and then and Thunderbird seems to be a little much too "90ties" for me :-) .

Good Job!