Can I revert Mail.app to handle notifications in the pre-10.9.2 way? After updating to the latest Mavericks version (10.9.2), the behaviour of the new mail notifications changed. Before, if I clicked on the notification, the main Mail.app window would open and show the message in the thread preview pane. After the update, the message is opened into it's own window (same as double-clicking the message in the main window), which is not what I want.

Is there a setting somewhere to restore the previous behaviour?
Unfortunately this does not work out of the box. But there is a nice and free plugin called Herald which gives you this exact feature back, and many more on top.

(See Version 4.0.8 (Mac OS X 10.9) by clicking on "Old Versions").

Please close your Mail.app before installing.