海外邮件中继解决很难退信解释说明

下面介绍下几个经常很难解决的退信说明，通过邮件中继能够解决的海外邮件问题，或拒收或当作垃圾退信，或者中断。

Could not deliver message to the following recipient(s):

1、IP地址被过滤了对方

Failed Recipient: oiwas1995@abc.com

Reason: Remote host said: 553 IP has been filtered

2、被对方的趋势反垃圾给封锁了。

host said: 550 5.7.1 Your email messages have been blocked by the recipient OR by Trend Micro Email Reputation Service. Contact the recipient or his/her administrator using alternate means to resolve the issue.

3、 yahoo中国邮箱已经封锁了，现在是阿里云来接收，但是很多已经不存在了。从2013年8月份就开始中断了

554 delivery error: dd This user doesn't have a yahoo.com.cn e-mailaccount (glicoshenzhen@yahoo.com.cn) [0] - mx1.aliyun.com