发信被退回

zhaoyang

----- The following addresses had permanent fatal errors ----- <***@hycorp.com.tw><br>(reason: 553 5.3.5 system config error)<br>
<br>----- Transcript of session follows -----<br>
553 5.3.5 127.0.0.1. config error: mail loops back to me (MX problem?) 554 5.3.5 Local configuration error<br>
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这是什么原因?我发到其他网站都没有问题