Mozilla Thunderbird 0.8

Thunderbird 0.8 is Mozilla's next generation e-mail client. Thunderbird makes emailing safer, faster and easier than ever before with the industry's best implementations of features such as intelligent spam filters, a built-in spell checker, extension support, and much more.

What's New:

POP3 users can now combine all of their POP3 accounts into a single global inbox under local folders.
Switching to Thunderbird has never been easier since Thunderbird can now migrate all of your e-mail data including settings, mail folders and address book data from common mail applications such as the Mozilla 1.x Suite, Outlook Express, Outlook and Eudora.
Thunderbird now features a built in RSS reader which allows you to easily subscribe to and read news and weblogs that support RSS.
In order to help protect your privacy, Thunderbird now automatically blocks remote image requests in e-mails from senders you don't know.
Thunderbird now makes it even easier to manage your e-mail. Quick search now supports many different types of search criteria including the ability to search message body text. Thunderbird can also highlight the quick search terms in the message body.
Support for using a master password to encrypt saved e-mail account passwords.
Linux GNOME users can now make Thunderbird their default e-mail client (Tools > Options > General).
If your network uses proxy authentication for HTTP, Thunderbird now correctly prompts for proxy authentication instead of silently failing.