At the end of this week, Thunderbird 2.0 Release Candidate will be released - that is, the last intermediate version before the release, which is scheduled for the end of April. Thunderbird is an open source desktop email client from Mozilla. Thunderbird is adopting more and more web functionality from Firefox. Thunderbird is a cross-platform client that runs on MacOS X, Linux, Windows (in the new version with support for Vista). The first release took place in spring 2003 and since then the program has been used by 10 million people.
The main changes in the new version is the tagging of letters (like topics on Habré), new integration with GMail and Apple .mac, new features for viewing and warning about new messages.
New opportunitiesThe new version of Thunderbird is designed to protect users from information overload. To this end, the client has gained more flexibility (add-on support, as in Firefox), security has also been enhanced. The following mail organization enhancements have been introduced: Message tagging and improved search Advanced message viewing capabilities New message warning GMail and .Mac integration
Now about everything in order :)')
Tagging allows you to add as many tags to your post as you see fit. In the future, it will help you to save a couple of minutes on finding the right letter.
Enhanced message viewing allows you to display only the directories you need. So you can choose the function of displaying folders with unread messages.
There were also navigation keys (as in browsers), allowing you to view message history. That is, it will be possible to scroll through the message chain, as is done in GMail, in chronological order. Now it will be possible to read the ordered comments on Habré! :)

When you receive each new letter will appear a warning about new messages. However, the function can be disabled if it bothers you. Unfortunately, now the “warning box” does not have flexible settings, that is, you cannot set a filter that would display a “warning box” about new letters only from a number of contacts, and not from all.
Search in the new version displays the results as you type, as is done in Google Suggest. By the way, the search takes place in correspondence, rss-feeds, news ... And search queries can be saved.
The integration of Thunderbird 2 with Gmail and .Mac consists in the absence of the need to set POP and SMTP server settings. Soon there will be support for other mail services.
The greatest strength of Thunderbird 2 is extensibility. Like Firefox, Thunderbird is an open source product that allows third-party developers to create their own extensions. Already, there are hundreds of extensions that include contact managers, VoIP phones, various network tools.