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Thunderbird is an open source project, which means anyone can contribute ideas, designs, code, and time helping fellow users.
Join UsThunderbird
Thunderbird er et gratis mailprogram, som er let at sætte op og tilpasse - og det er fyldt med fantastiske funktioner!
The Future of Thunderbird
Experience cutting edge features. Provide feedback to help refine and polish what will be in the final release.
Thunderbird Daily
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!