As an embedded feature within the Mozilla web browser, Thunderbird was a fine email component offered as part of the entire Mozilla experience. Recently, this email client was released as a stand-alone application, and it is definitely worth taking a look at. With this latest version of Thunderbird, visitors have access to a number of great security features (such as message encryption) and a number of layout options. Visitors will also find a number of standard features included, such as message searching and return receipts. This version is compatible with all computers running Windows 98 and newer.