アドオン
![[警告]](https://addons.thunderbird.net/static/img/developers/test-warning.png?b=b00ed3ed-652d8172)
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このアドオンについて
If you've ever needed to delete all the emails you have read in one go without selecting them and deleting manually then this add-on could be useful
The toolbar button will not show up the first time you run it, you have to drag and drop it from the customize toolbar by right clicking on the mail toolbar and clicking "Customize"
The toolbar button will not show up the first time you run it, you have to drag and drop it from the customize toolbar by right clicking on the mail toolbar and clicking "Customize"
