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

Thunderbird for Mac

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Thunderbird 3.1.5

  -  20.56 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 3.1.5.


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.


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 3.1.5

  • Thunderbird 3.1.5 Screenshots

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    Thunderbird 3.1.5 Screenshot 1
  • Thunderbird 3.1.5 Screenshot 2
  • Thunderbird 3.1.5 Screenshot 3
  • Thunderbird 3.1.5 Screenshot 4
  • Thunderbird 3.1.5 Screenshot 5

What's new in this version:

- MFSA 2010-72 Insecure Diffie-Hellman key exchange
- MFSA 2010-71 Unsafe library loading vulnerabilities
- MFSA 2010-70 SSL wildcard certificate matching IP addresses
- MFSA 2010-69 Cross-site information disclosure via modal calls
- MFSA 2010-67 Dangling pointer vulnerability in LookupGetterOrSetter
- MFSA 2010-66 Use-after-free error in nsBarProp
- MFSA 2010-65 Buffer overflow and memory corruption using document.write
- MFSA 2010-64 Miscellaneous memory safety hazards (rv:1.9.2.11/ 1.9.1.14)

- Several fixes to improve the user interface and add-ons experience.

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