I found this email filtering app to be quite easy and enjoyable to use if youre like me, who likes to try various other ways to receive and store your emails as opposed to using the preinstalled email app that comes standard with all iPhones and iPads. You should definetly give it a try, and like myself, you just might start using it as your official way of receiving and storing all future emails instead of the pre-installed, standard email app on your iPhone and iPads.
Highly recommended!!
SAHendry about ibisMail - Filtering Mail, v4.0.1