装好exchange， 就在同一台电脑上 用outlook 自己给自己发送邮件，能发送出去，但接受不到，到mailroot里面一看 全部到了死信目录bad mail里面，下面是错误信息，请问是什么原因造成的？
Unable to deliver this message because the follow error was encountered: "This message is a delivery status notification that cannot be delivered.".
The specific error code was 0xC00402C7.
The message sender was <>.
The message was intended for the following recipients.
------解决方案--------------------
你exchange服务器必须指向一个dns服务器，这个服务器能解析所有的目的地址。例如：[email protected]，[email protected]的