554 5.7.1 The message matches a profile the Internet community may consider spam
2016/5/19 13:59:38 点击：
554 5.7.1 The message from (<ly@hs*****.cn>) with the subject of (=?gb2312?B?tPC4tDogNS8xM7eiu/XD98+4?=) matches a profile the Internet community may consider spam. Please revise your message before resending.
退信原因：邮件内容或者标题含有对方认定为可能是垃圾邮件的关键字，因此对方认为是垃圾邮件拒收了邮件
解决方案：修改邮件标题和内容，然后重新发送邮件即可。至于对方过滤了什么关键字，只有对方才知道
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