Provided by Mozilla

Thunderbird is a free alternative to Microsoft Outlook and includes many great features to help you manage your inbox. With Thunderbird, it's easier to prioritize and find your important email with tags and the new find bar helps you find content within your email faster.

• Customize Your Email Experience
  Thunderbird allows you to customize your email to suit your specific needs whether it's how you search and find messages or listening to music right out of your inbox.
• Your Mail, Your Way
  Thunderbird users can increase Thunderbird's functionality and appearance using hundreds of add-ons. A Thunderbird add-on can let you place voice over IP calls, listen to music, manage contacts, and keep track of birth dates all from your inbox. You can even change the appearance of Thunderbird to suit your tastes.
• Message Templates
  Thunderbird allows you to easily set up message templates to save you time - especially if you have to send the same mail message repeatedly.
• Add-ons Manager for Extensions and Themes
  The new Add-ons Manager improves the user interface for managing extensions and themes, making it even easier for you to customize Thunderbird.
• Secure and Protect Your Mail
  Thunderbird's security and privacy measures ensure that your communications and identity remain safe.
• Cutting Out the Junk
  Thunderbird's popular junk mail tools have been updated to stay ahead of spam. Each email you receive passes through Thunderbird's leading-edge junk mail filters. Each time you mark messages as spam, Thunderbird "learns" and improves its filtering so you can spend more time reading the mail that matters. Thunderbird can also use your mail provider's spam filters to keep junk mail out of your inbox.
• Robust Privacy
  Thunderbird offers improved support for user privacy and remote image protection. To ensure a user's privacy, Thunderbird automatically blocks remote images in email messages.
• Phishing Protection
  Thunderbird protects you from email scams which try to trick users into handing over personal and confidential information by indicating when a message is a potential phishing attempt. As a second line of defense, Thunderbird warns you when you click on a link which appears to be taking you to a different Web site than the one indicated by the URL in the message.
• Automated Update
  Thunderbird's update system checks to see if you're running the latest version, and notifies you when a security update is available. These security updates are small (usually 200KB - 700KB), giving you only what you need and making the security update quick to download and install. The automated update system provides updates for Thunderbird on Windows, Mac OS X, and Linux in over 30 different languages.
• Open Source
  At the heart of Thunderbird is an open source development process driven by thousands of passionate, experienced developers and security experts spread all over the world. Our openness and active community of experts helps to ensure our products are more secure and quickly updated, while also enabling us to take advantage of the best third party security scanning and evaluation tools to further bolster overall security.