Thunderbird Desktop
Version 91.1.2 | Released September 28, 2021
Check out the notes below for this version of Thunderbird. As always, you’re encouraged to tell us what you think, or file a bug in Bugzilla.
For more on all the new features in Thunderbird 91, see New in Thunderbird 91.0.
System Requirements: Details
- Windows: Windows 7 or later
- Mac: macOS 10.12 or later (macOS 11.0 for Silicon)
- Linux: GTK+ 3.14 or higher
What’s Changed
changed
Thunderbird will now warn if an S/MIME encrypted message includes BCC recipients
What’s Fixed
fixed
Message Security popup did not display all recipients due a missing scrollbar
fixed
Delivery Status Notifications were only shown for the first recipient
fixed
Composing a message from a template with attachments failed due to a temporary file being removed
fixed
Attachment sizes were no longer included on printed emails
fixed
A message sent with multiple attachments sometimes only sent one
fixed
Thunderbird sometimes attached the wrong messages when forwarding multiple messages by attachment
fixed
Thunderbird did not re-prompt for an SMTP username if one was not provided
fixed
Messages with BCC recipients that were held in the Outbox did not retain the BCC header when moved to the Sent folder
fixed
Thunderbird displayed reminders for events that were cancelled or declined
fixed
New Feed Account dialog did not honor dark mode
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