Mozilla Thunderbird Extended Support Release

A community-lead project that allows organizations to benefit from the speed, flexibility and security of Thunderbird while getting the support they need.

Not from an organization?

If you’re looking for Thunderbird, please visit our Thunderbird page.

The Thunderbird Extended Support Releases (ESR) have now been merged into the mainstream releases.

The mainstream releases are now operating to similar standards as the Mozilla Firefox ESR - they are stable for approximately one year, before receiving feature updates.

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You can still sign up to our Enterprise mailing list to get help with Enterprise deployments and other regular communications regarding Thunderbird and Enterprises