Mailboxs biggest update yet is out in the App Store. Version 2.0 of the iOS email app brings Auto-swipe, a feature that predicts which messages you might want to respond to in a while, which threads youve had enough of, and which messages youll send straight to the archive folder. The app very quietly makes suggestions about improving what it does, co-founder Gentry Underwood told The Verge earlier this month, and when you choose one, you just made Mailbox smarter.