Thunderbird

Thunderbird

[2] Thunderbird — メールをもっと簡単に。 — Mozilla () <https://www.mozilla.org/ja/thunderbird/>

[1] Thunderbird’s Future Home | The Mozilla Thunderbird Blog () <https://blog.mozilla.org/thunderbird/2017/05/thunderbirds-future-home/>

[3] Mozilla Thunderbird - Wikipedia () <https://ja.wikipedia.org/wiki/Mozilla_Thunderbird>