Download Thunderbird 5.0 Beta 1

Mozilla Thunderbird is a free, open source e-mail and news client and feed reader developed by the Mozilla Foundation. Thunderbird has IMAP/POP support, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.