Rated 5 out of 5 stars

I was poking around in `View-Source` on a spam email that got through the filter, and found myself saying "it'd sure be handy if there was an easier way to view this info." Sure enough, an add-on existed, *and* was actively maintained! After following the on-boarding procedures ("Repair Folder" to rebuild folder indices), the add-on worked in both the List view and email view, with a nice interface breaking down the scoring components. Excellent job!