Mozilla released the latest version of thunderbird, Thunderbird 5.0, after 1 and a half year of Thunderbird 3.1. The major release has the version number 5.0 (and notthunderbird 4.0!) to match the latest Firefox version 5.0 that was released a week back. The open source cross-platform email client and news reader promises to be efficient fast and better! The post reviews the new features of Thunderbird 5.0!