There aren't a lot of Microsoft Outlook competitors out there, but Mozilla's open-source Thunderbird is one of the best. Postbox for Windows and Mac, and built on Thunderbird code the way that Flock is based on Firefox, is a new face on the e-mail field.
Postbox looks like Thunderbird, but offers a lot of Web 2.0 features.
(Credit: CNET Networks)
Still in beta, Postbox takes desktop e-mail hard toward Web 2.0, with fast links to upload contacts to Facebook and pictures to Picasa. Click on an e-mail, and the preview pane not only shows the text, but extracts all links, images, other attachments, and contacts into a sidebar for easy management. Postbox is also obsessed with tabs, which are coming in Thunderbird 3.0 but not to this degree--at least not from what we've seen. Postbox can also upload to Twitter, FriendFeed, MySpace, del.icio.us, and Google.
When Postbox starts, you can import e-mail, contacts, and other messaging data from Thunderbird, Outlook, Google, and Yahoo. Once you get going, Postbox's tabs can be used to filter out the text of a message an
Yes. It is too good to resist. Now I have migrated from Thunderbird to Postbox but I miss the extensions in Thunderbird. I am waiting for the Linux version as I have migrated to Ubuntu and using Wine to run Postbox ( Thank God. Wine didnt reject it) But the Postbox in Windows and in Wine are not functioning exactly same. Some buttons are missing and to open links I need to install Firefox windows version on Wine as IE in wine is not working. But I can say I am able to run Postbox on Linux. I am waiting, waiting.