Thunderbird gives you IMAP/POP support, a built-in RSS reader, 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.

Thunderbird Main Feature:

• * Full-Featured Email
• * Junk Mail Filters
• * Anti-Phishing Protection
• * Advanced Security
• * Automatic Updates

• MFSA 2008-12 Heap buffer overflow in external MIME bodies
• MFSA 2008-07 Possible information disclosure in BMP decoder
• MFSA 2008-05 Directory traversal via chrome: URI
• MFSA 2008-03 Privilege escalation, XSS, Remote Code Execution
• MFSA 2008-01 Crashes with evidence of memory corruption (rv:1.8.1.12)