Postbox 4.0

Postbox is a new email application that helps you organize your work life and get stuff done.
It has all the elegance and simplicity of Apple Mail, but with more power and flexibility to manage even the most demanding workloads. Key Features Ultra-Fast Search - Instantly find messages, attachments, images, links, and contacts. Conversation Views - Make sense of email threads through chronological message views. Better Organization - Tabs, Topics, and To-Dos help you stay organized with less effort. Works Great with OS X - Postbox integrates with the Address Book, iCal, iPhoto, Spotlight, and Quick Look. Postbox even works with OmniFocus and Things! Quick and Easy Setup - Postbox will automatically determine your connection settings for you!
Postbox is available in English, German, French, Spanish (Spain), English (British), Italian, Dutch, Portuguese (Brazilian), Russian, and Swedish.
With all the time you spend in email each day, you owe it to yourself to try Postbox today!