Welcome to Mozilla Thunderbird Help

To display information about Mozilla Thunderbird in this window, click tabs or topics in the sidebar:

• Contents shows main topics and subtopics.
• Index lists all help topics alphabetically.
• Glossary defines key terms used throughout Thunderbird Help.

You can also use Search to find specific information within Thunderbird Help. For more information on using Thunderbird Help, see Using the Help Window.

If you can't find what you need here, you can find more help and support options online at Thunderbird Help.