Postbox has launched version 2.5 of their self-titled alternative e-mail client for Mac and Windows, bringing full 64-bit support for OS X (the Windows version is still 32-bit for now), a new double-row vertical thread pane view option, a streamlined message view and a new Mac theme featuring a new icon set by Panic's Kenichi Yoshida. The new version also includes improvements across the entire interface, expanded options and more.
