Thunderbird 91.1.2

Thunderbird

Thunderbird is a free, open-source, cross-platform application for managing email and news feeds. It is a local (rather than a web-based) email application that is powerful yet easy-to-use. Thunderbird is developed, tested, translated and supported by the folks at Mozilla Corporation and by a group of dedicated volunteers. Thunderbird gives you control and ownership over your email. There are lots of add-ons available for Thunderbird that enable you to extend and customize your email experience.

Thunderbird gives you IMAP/POP support, a built-in RSS reader, support for HTML mail, powerful quick search, saved search folders, advanced message filtering, message grouping, labels, return receipts, smart address book LDAP address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.

Changes in Thunderbird 91.1.2:

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 cancelled or declined
New Feed Account dialog did not honor dark mode