Mozilla Thunderbird 3.1.1 - Mozilla Thunderbird is a fully featured, secure and very functional email client and RSS feed reader. Mozilla Thunderbird 3.1.1 lets you handle mail efficiently and with style, and Mozilla Thunderbird filters away junk mail too.

Here's Mozilla Thunderbird 3.1.1 main features

• Mozilla Thunderbird manages multiple POP and IMAP email accounts and reads RSS feeds.
• A junk mail filter using Bayesian statistics cans spam automatically in Mozilla Thunderbird.
• Mail views, free-form message tags and flexible filters let you organize and prioritize good mail easily.
• Searches can be saved to virtual folders that automatically aggregate relevant mail in Thunderbird.
• Mozilla Thunderbird offers rich, but security and privacy conscious HTML formatting support.
• Mail classified as junk can automatically be sanitized, Thunderbird detects common scam tactics.
• S/MIME support lets you encrypt and sign mail in Mozilla Thunderbird (OpenPGP plug-in available).
• You can run Mozilla Thunderbird from a removable medium such as USB stick.
• Many extensions more allow Mozilla Thunderbird to expand its feature set or improve usability.
• Mozilla Thunderbird supports Windows 98/ME/NT/2000/XP/Vista, Mac OS X 10.2-10.4 and Linux.