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Thunderbird is an open source project, which means anyone can contribute ideas, designs, code, and time helping fellow users.

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

Experience cutting edge features. Provide feedback to help refine and polish what will be in the final release.

Help us test the newest developments made to Thunderbird every day by using the unstable Daily channel.

WARNING! Daily is an unstable testing and development platform, make sure you back up important data regularly!