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退信原因 不 明白 求赐教 解决办法

可以帮我看下这是什么原因引起的退信吗 Subject: Delivery Status Notification (Failure) Delivery to the following recipient failed permanently:      123@camerichusa.com Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the relay mail.camerichusa.com [209.221.166.20]. The error that the other server returned was: 550 5.7.1 Message rejected as spam by Content Filtering

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camerich 2016-09-05 14:53:38 2803 0
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