Letterbox is the widescreen plugin for older versions of Apple Mail. It rearranges the interface into three vertical columns.
Choose the version of Letterbox appropriate to your version of OS X:
- I do not have a version of Letterbox for OS X 10.7 and 10.8 (Lion and Mountain Lion). These versions of OS X support a 3-column view in Mail. If you'd prefer a Letterbox-style view, send me an email to encourage me to make a version for 10.7+.
- Letterbox for 10.6 (Snow Leopard)
- Letterbox for 10.5 (Leopard)
- Letterbox for 10.4 (Tiger)
Letterbox is open-source: please browse the source on GitHub, or fork it to offer an improvement.