Orchestra took the iOS world by storm last month when it released its iOS email client, Mailbox. It was so popular at launch that Orchestra had to institute a registration process that gave access to the service on a rolling basis. Less than one month after launch, the team at Mailbox announced it has filled more than 1 million reservations.

If you haven't used it, Mailbox app is more than just a client to send and receive emails. It uses the principles of a task manager to help you organize your incoming email into a manageable list. It's an interesting take on the usually boring email client and has caught the eye of users and app developers alike. Dropbox scooped up the company in a recently announced acquisition.

Along with its 1 million mailbox announcement, Orchestra/Dropbox also confirmed that the company has updated the Mailbox app with some UI enhancements and a new shake-to-undo feature. You can download Mailbox from the iOS App Store for free.

This article was originally published on Tuaw.