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

Thunderbird (64-bit)
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Thunderbird 146.0 (64-bit)

  -  74.5 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 146.0 (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.


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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 146.0 (64-bit)
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  • Thunderbird 146.0 (64-bit) Screenshots

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    Thunderbird 146.0 (64-bit) Screenshot 1
  • Thunderbird 146.0 (64-bit) Screenshot 2

What's new in this version:

New:
- Enabled configuration of preferred OpenPGP keyserver via the UI

Changed:
- Existing logins are migrated to make use of more modern AES cryptography

Fixed:
- Memory was not cleaned up after opening New Window from folder pane context menu
- Thunderbird could crash in server subscription logic
- Importing a vCard only displayed VCF files in the file picker
- Could not distinguish folders with same name in 'Recent Destinations' and 'Favorites'
- Could not compose new message if the folder pane was empty
- 'Delete' was missing from context menu when multiple IMAP folders were selected
- 'Delete' button in unified toolbar could delete attachments instead of message
- 'Recent destinations' submenu was not sorted by time of modification
- Account column could display incorrect account name
- 'Tag' submenu of mail context menu could be populated incorrectly
- Extending the expiration date of OpenPGP key set incorrect date
- Could not sign/encrypt (PGP) when using -compose and Thunderbird was not running
- Account Hub email success messages were not always accurate about config source
- Account Hub advanced config setup did not include default outgoing config
- Account Hub local address book creation could continue with blank name
- Detailed security exception dialog was not shown when adding certificate exception
- The default account could be reset after restart if uninitialized
- Opening a vCard (.vcf) from file manager or CLI did not work in some cases
- Dragging attachments on macOS to folder or desktop no longer worked
- EWS folder properties "Select this folder for offline use" did not work
- Thunderbird could crash when mail folder was renamed or moved
- Account Hub could fail when manually creating EWS account
- 'Offline' folder flag for EWS folders was reset on restart
- 'Open with' of Microsoft Office attachment did not mark file with MOTW label
- Visual and UX improvements
- Security fixes

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