Despite Mailbox's attractions, it's not without its limitations: Currently, it only supports Gmail and iCloud. Dropbox says that it will be adding support for other platforms in the future, but has not specified any kind of timeline for doing so. Also unclear is which mail platforms it would support, through Microsoft Exchange, IMAP, and custom domains would probably be welcome additions.
Another alternative is that Dropbox could also roll out email on its own server: Beta invitations are delivered from an address ending in mailboxapp.com. However, Dropbox has announced no plans to venture into this area.
Like the iOS version, Mailbox for Mac maintains a minimalist look, with plenty of white space and clean fonts. It supports full-screen display on OS X so you can focus in on taking care of your mail, without external distractions.
To get the beta for yourself, head to the Mailbox site and enter your email address into the "Request a betacoin" box. You can still download the application, but you won't be able to activate it until your betacoin arrives via email; as with Mailbox's initial iOS launch, the app is gradually being rolled out to interested users.
Once you do get an elusive betacoin, just drag it into the virtual cartoon can that's displayed when Mailbox for Mac launches. Input your Dropbox credentials and then start swiping and snoozing emails until there aren't any left.
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