Tam özellikli, ücretsiz bir e-posta programı.
ftp://ftp.mozilla.org/pub/mozilla.org/thunderbird/releases/5.0/win32/tr/Thunderbird Setup 5.0.exe
ftp://ftp.mozilla.org/pub/mozilla.org/thunderbird/releases/5.0/win32/tr/Thunderbird Setup 5.0.exe