Mailbox is now optimized for iPad to make email light, fast, and mobile-friendly.

Finally after been acquired by Dropbox, Mailbox is now available on iPad. This means, you can henceforth easily swipe your messages to your archive or trash, scan conversation , get push
notifications for new messages , add your GMail accounts and so on.
Mailbox is a free email management application for iOS developed by Orchestra, Inc. The application received coverage on numerous technology blogs for its ease-of-use and innovative features, including swipe-based email sorting and filtering