アドオン
![[警告]](https://addons.thunderbird.net/static/img/developers/test-warning.png?b=58a99cbb-667a0970)
許可設定
このアドオンについて
This extension helps to warn the user when composing a message to a mixed group of people both in and out of the sender's organization. If a message has recipients at the same domain as the sender, as well as some other domains, the external addresses are highlighted in orange as a reminder or warning that the email is being sent to people outside the sender's organization. It is intended to help prevent accidental disclosures when an external email address gets included on a thread.
