A free email application from Mozilla that`s easy to set up and customize

Thunderbird for Mac

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Download Thunderbird 91.1.2

  -  119 MB  -  Open Source

What's new in this version:

Changed:
- Thunderbird will now warn if an S/MIME encrypted message includes BCC recipients

Fixed:
- 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

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