Boxer

Boxer is an email client that can sync all your accounts, whether they be Gmail, Exchange, Outlook, Yahoo, Hotmail, iCloud, AOL, or Office 365. Among the many features Boxer offers you'll find you can use different gesture shortcuts to delete or archive emails. You can also disable these shortcuts if you find them annoying. Another very interesting feature is integration with other apps like Evernote, Dropbox, Facebook, and many others, allowing you to sync between applications and automate actions that would normally take up more time. Boxer is a powerful and elegant mail client that allows you to manage all your email accounts from a single app.