Letterbox is a plugin for Apple's Mail.app that takes advantage of your widescreen monitor. It rearranges the interface into three vertical columns so the message pane is to the right of the message list, rather than below.
Fixes an issue in which Letterbox sometimes “forgot” the preview pane position after you closed the message viewer window.
Tweaks the two-line view, putting the sender in bold on the first line, resembling the iPhone and MobileMe views. (The issues with the two-line view and fonts other than Helvetica or Lucida Grande aren’t yet fixed in this release, sorry).
DESIGNG Just downloaded 10.6.4 update, did a restart and a message came up saying (to the effect) that Letterbox has been disengaged and check with developer for compatibility with Mail 4.3 and Message 4.3
MISHA Looks like the developer's site is temporarily offline. (Version 0.24b6)
0
Apr 12 2010
DOCHOZ For a long time I have been looking for a Vertical Layout. Tried several other programs and plug-ins. So far this the best one I've found and it's a donation-ware. My only problem was with installing the application. Double clicking opens an email message to Aaron. I just copied the plug-in to the email plug-in folder. (Version 0.24b6)
KOBALT Click on Letterbox.mailbundle only once (to select it) then hit cmd+i (Get Info) and change the 'Open with' from TextEdit' to 'Mail Plugin Manager'. Close the information pane and double click Letterbox.mailbundle to start the install procedure. (Version 0.24b6)
+1
Mar 10 2010
PADDY_NYC Confused why this isn't an option w/ Apple Mail by itself, but certainly grateful the developer coded this. (Version 0.24b6)