added Linux email support
added Linux email support

kostyll/plyer,johnbolia/plyer,cleett/plyer,KeyWeeUsr/plyer,kived/plyer,johnbolia/plyer,KeyWeeUsr/plyer,cleett/plyer,KeyWeeUsr/plyer,kivy/plyer,kived/plyer,kivy/plyer,kostyll/plyer,kivy/plyer