Software Update: Mozilla Thunderbird 91.1.2

The Mozilla Foundation has released version 91.1.2 of Thunderbird. Thunderbird is an open source email and newsgroup client, with features such as support for several mail and news accounts, a spam filter, spell checker, and a customizable look and feel. In version 91 has included a warning when an email is sent to a possibly non-existent address, or when 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.

At the moment it is not yet possible to do an automatic update from version 78 to 91. An existing installation can be updated by manually downloading and running the installation file. This automatic migration will be added in a future version. The following changes and improvements have also been made in this release:

changes

• Thunderbird will now warn if an S/MIME encrypted message includes BCC recipients

Fixes

• Message Security popup did not display all recipients due a missing scrollbar
• Delivery Status Notifications were only shown for the first recipient
• Composing a message from a template with attachments failed due to a temporary file being removed
• Attachment sizes were no longer included on printed emails
• A message sent with multiple attachments sometimes only sent one
• Thunderbird sometimes attached the wrong messages when forwarding multiple messages by attachment
• Thunderbird did not re-prompt for an SMTP username if one was not provided
• Messages with BCC recipients that were held in the Outbox did not retain the BCC header when moved to the Sent folder
• Thunderbird displayed reminders for events that were canceled or declined
• New Feed Account dialog did not honor dark mode