Editor’s note: Yesterday, Mozilla announced a new version of Thunderbird. You can read full details here. Below is an excerpt from the blog post.
The latest version of Thunderbird includes more than 390 improvements and performance enhancements that make Thunderbird more responsive, faster to start up and easier to use. Thunderbird delivers several improvements to some favorite features such as RSS feeds, Attachment management, and Tabs which can now be reordered and dragged into a new window.