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

Thunderbird for Mac
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Thunderbird 143.0

  -  133 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 143.0.


For those interested in downloading the most recent release of Thunderbird for Mac 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 143.0
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  • Thunderbird 143.0 Screenshots

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    Thunderbird 143.0 Screenshot 1
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  • Thunderbird 143.0 Screenshot 5

What's new in this version:

Fixed:
- Web pages with bad certificates displayed as blank
- Users could no longer send using smtp-relay.gmail.com
- Changing to new drafts folder and then back did not correctly restore the folder
- Option did not exist to create new address book under File -> New
- Some folders showed new mail count prior to receiving mail
- Menu bar was hidden after updating from 128esr to 140esr
- Menu Bar -> View contained duplicate accelerator keys
- Warning was not logged if mail.openpgp.alias_rules_file file did not exist
- Cmd+Shift+F no longer invoked "Search Messages" on macOS
- Arrow key selection in global search bar skipped every other result
- Drag-drop of unselected contact inserted wrong or no email address
- Thunderbird could crash on startup
- Adding an account could fail and cause UI hang
- Thunderbird could crash when importing mail
- Windows new message notification click did not bring Thunderbird to foreground
- Delete or detach attachments did not work for some IMAP servers
- Saving a new draft retained superceded version
- Language field in settings was empty after restart in Troubleshoot Mode
- Visual and UX improvements
- Security fixes

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