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
Instead of having to choose the outgoing message format every time you send a message (if you want something other than "Auto-Detect"), this extension allows you to set the default outgoing message format to Auto-Detect, Plain Text Only, Rich Text (HTML) or Plain an Rich (HTML) Text.
