Mozilla Thunderbird makes e-mailing safer, faster, and easier with such features as intelligent spam filters, a built-in RSS reader, and quick search. Thunderbird was designed to prevent viruses and to stop junk mail. Thunderbird 3 includes tabbed e-mail, new search tools and indexing, smart folders, support for Firefox's Personas, a simplified setup wizard, and robust junk protections that include phishing and spam filters.
What's new in this version:
Version 5.0 improves responsiveness and reduced startup time. It's based on the new Gecko 5 engine and also includes a new add-ons manager. Email setup is also improved with a revised account creation wizard, and plugins can now be loaded in RSS feeds by default. This version also includes over 390 fixes to improve speed, performance, security, and stability.