然后会出现一个显示原收件人的对话框，可以取消选中，或者选择收件人来获取响应(参见图2)。

A dialog box then displays that shows the original recipients, any of which you can deselect or choose to get a response (see figure 2).

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如果邮件被收件人转发，则转发邮件无法由原发件人收回，因为UNID与原文档的不同。

If a message has been forwarded by a recipient, the forwarded message is not recalled by the original sender's recall request because the UNID differs from that of the original.

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