邮件系统:Imail 8.15版本<br>
故障:系统退信,以前能给客户邮箱发邮件,现在全部被退回;发sina/yahoo/163等均正常<br>
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退信内容大致如下:<br>
undeliverable to XXXX@abc.net<br>
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Server response to MAIL FROM:<br>
550 5.7.1 Your host XXX.XXX.XXX.XXX has no DNS record . If you are using a firewall please configure DNS and try again authoritative host not found<br>
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查看对方的MX记录都是按标准做的,我的MX记录也是正确的。