Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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Thunderbird add-ons - frequently asked questions

Thunderbird add-ons - frequently asked questions

Add-ons are extensions and other additions that add new functionality to Thunderbird or change its appearance.

OAuth2 Authentication for Yahoo, AOL and ATT

OAuth2 Authentication for Yahoo, AOL and ATT

How to set up Yahoo! services (including AOL, ATT and other services that use Yahoo servers) in Thunderbird.

Filelink for Large Attachments

Filelink for Large Attachments

Messages with large attachments are often rejected by mail servers. Thunderbird can use web-based storage services to send large file attachments.

Compacting folders

Compacting folders

This article explains how Thunderbird stores messages on a disk drive and why it is necessary to periodically compact (purge).

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