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

Thunderbird (64-bit)
Report    Share

Browse by Company

Adobe, Apowersoft, Ashampoo, Autodesk, Avast, Corel, Cyberlink, Google, iMyFone, iTop, Movavi, PassFab, Passper, Stardock, Tenorshare, Wargaming, Wondershare

Thunderbird 137.0 (64-bit)

  -  69.5 MB  -  Open Source
Free Download

Security Status

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Thunderbird 137.0 (64-bit).


For those interested in downloading the most recent release of Thunderbird (64-bit) or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


We would love to hear from you

If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

Download Thunderbird 137.0 (64-bit)

  • Thunderbird 137.0 (64-bit) Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

    Thunderbird 137.0 (64-bit) Screenshot 1
  • Thunderbird 137.0 (64-bit) Screenshot 2

What's new in this version:

Changed:
- File names are now used when storing mail folders (Windows only)

Fixed:
- In-app notifications did not display correctly in high contrast mode
- Repair folder did not fix mbox files produced on MacOS before Thunderbird 1.0
- Edit menu entries missing when group header selected in "Grouped by sort" view
- IMAP folder "Undelete" performed "Delete" when mixed messages were selected
- In RSS feeds, the space bar did not scroll the message like it did in emails
- Slow performance opening an .eml file in a profile with many folders
- Threaded search view was not updated correctly when sorted by date received
- Line spacing changed unexpectedly in the message list with the default font size
- Saved message list selection was discarded when user made a new selection
- Replying from local or unified folders failed when the message pane was hidden
- Message security panel strings were used in the wrong places
- Importing an OpenPGP public key with whitespace failed
- Unable to open attached signed OpenPGP .eml message
- Right-clicking "Decrypt and Save As..." on an attachment file failed
- Searching during shutdown could cause crash
- Failed news message sending could close the compose window unexpectedly
- Having a corrupt address book database prevented sending mail
- Forwarding messages as attachments could use the wrong MIME type
- Two-factor auth via text or email did not work with Office 365 using Oauth2
- Account settings menu could be loaded twice
- No gap existed between Back and Forward buttons in the Feed Account Wizard dialog
- Thunderbird could crash when importing mail
- Unable to auto-discover Address Book on Radicale server
- Mark-Of-The-Web was not applied to attachments saved via drag and drop
- Some messages could not be scrolled due to hidden overflows in inline styles
- Clicking a 'mid:' link could clear the thread pane and cause errors
- Performance regressed when moving/copying messages on Windows
- Automatic compact did not attempt to compact all folders when error encountered
- Slow performance when moving bulk messages from IMAP to local
- Crossposting news article was not possible if newsgroups on different servers
- IRC channel was not visible after restart
- Unable to view full certificate chain from the "View Signature" button
- Visual and UX improvements
- Security fixes

Top Downloads

More Popular Software »