Six weeks after launching, Mailbox today announced that it had fulfilled one million reservations for its popular mail management app. 

Before the app went live, Orchestra, the company behind Mailbox, implemented a reservation system in order to deal with demand. Though highly criticized, Mailbox experienced only a few significant outages during the weeks after the app launched. 

Last Friday, Dropbox revealed that it had purchased Mailbox for a reported $50 to $100 million and as a result, reservations were able to be fulfilled faster thanks to Dropbox's established infrastructure. 

Mailbox also launched its first major update today, adding a new shake to undo feature that will return the last deleted or archived message back to the inbox. The update also includes user interface enhancements, bug fixes, and performance optimizations. 

What's New in Version 1.1.0 
- Shake to undo! 
- UI enhancements 
- Bug fixes and performance optimizations

Though fulfillment times have improved, the wait list for Mailbox still sits at over 450,000 users. Mailbox is a free app for the iPhone that can be downloaded from the App Store. [Direct Link]