Blue Mail

There aren’t all that many good email apps for Android. Most of the solutions that can be found in the Google Play Store are mediocre at best, but that’s not the case with Blue Mail. The application is complex and has support for pretty much all of the available protocols and services.
Users can expect a beautifully designed interface, group emailing, smart push notifications, support for an unlimited number of email accounts, and a large number of personalization options.
Other features include the ability to sync multiple mailboxes from all your providers in a Unified Interface, implementation of Material Design, a dark theme, support for Android Wear, configurable menus, complex widgets, and much more.