![To must occur only once 的图标](https://addons.thunderbird.net/user-media/addon_icons/987/987927-64.png?modified=3a89d280)
To must occur only once 3.4.2
作者: e-murakami
This add-on changes all but the first "to" to "cc" if there are multiple "to" when replying to an email.
关于这个附加组件
This add-on changes all but the first "to" to "cc" if there are multiple "to" when replying to an email.