The displayed message has been digitally signed, but not all its attachments have been downloaded yet. Therefore, the signature cannot be validated. Click OK to download the complete message and validate the signature.
当前显示的消息已经数字签名了，但是并不是所有的附件都已经下载了。因此，无法验证签名的有效性。请点击确定以下载整个消息以验证签名。