There were a few utilities available pre-Snow Leopard which allowed you to set up the Mac’s built in Mail client in three columns. Unfortunately all of them stopped working with the release of OS upgrade.
Letterbox is a small utility from Aarom Harnly. It works with the built in Mac Mail client and allows you to view your mail application in three columns. Aaron released a new beta last week that works with Snow Leopard.
In my opinion this little add-on makes the mail application look like it should be by default. I’ve been using it for a little while and it’s been performing exactly as I’d expect, making my mail reading experience just a little easier.
I have always had a passion for gear and gadgets. It all started for me with the release of the very first Palm Pilot. I've always had an interest in handheld electronics. From handheld PDAs, to cell phones, Mp3 players, watches and other products, I'm the first person my friends, family and colleagues call when they need advice on tech. I have roots in the online tech. forum community. I served as the Administrator to Howard Forums.com and as a Moderator at both Treo Central.com and Blackberry Forums.net. Under the screen name “lgreenberg” I've amassed 50,000+ postings. I also manage my own YouTube channel under the user name larrygreenberg. I'm always eager to help.