OS X Mail 6 - New Notifications, Visible VIPs and Synchronizing Settings

Without folders, filters, add-ons or services, OS X Mountain Lion's Mail can pick out and highlight your most important senders' messages; all you have to do is mark those senders with a star. Integration with Notification Center lets you receive alerts for these VIPs' messages, too, or for mail from anybody in your address book, for messages in a certain smart folder — or for all new mail, of course.
Mail 6 also comes with more simple a way of finding text inside emails and more choices to share web pages: as full HTML, Safari Reader's rendering (when available), just a link, and as a PDF file.
While OS X 10.8 promoted notes from Mail to a separate application (while the notes themselves are still, essentially, email drafts) and snatched RSS news feeds from both Mail and Safari, it has brought back preference synchronization. Via iCloud, Mail can share rules, signatures, options and smart folders with other Mac installations — and, come iOS 6, reportedly VIPs with iPhone and iPad as well.
›› Mail is the solid, powerful and easy to use email program built into OS X. While Mail's smart spam filter gets rid of practically all junk mail, the astonishingly fast and precise search and smart folders make finding and managing good mail a snap. (Mac)