Download Mozilla Thunderbird 91.6.0

The Mozilla Foundation has released version 91.6 of Thunderbird. Thunderbird is an open source client for e-mail and newsgroups, with features such as support for various mail and news accounts, a spam filter, spell checker, and a customizable appearance. In version 91 has included a warning when an email is sent to a potentially non-existent address, or if there are too many addresses on the public address line. There is also support for CardDAV and there is a native client for a Mac equipped with an Apple Silicon processor. The following changes and improvements have also been made in this release:

What’s New

• Thunderbird will now offer to send large forwarded attachments via FileLink

Fixes

• Partially signed unencrypted messages displayed an incorrect “partially encrypted” notification
• Attachments filenames were not sanitized before saving to disk
• In the attachment bar, the “Import OpenPGP Key” item displayed for public keys displayed an error and did not import the key
• “Open with” attachment dialog did not have a selected radio button option
• Various security fixes