前几天发现一台Linux服务器的网站上发来的邮件突然很少甚至没有了，可能导致客户联系不上，检查发现/var/spool/mail目录下root中有一些没有发出的邮件，其中说到：
----- The following addresses had permanent fatal errors -----
<webmaster@mingluji.com>
(reason: 554-m1pismtp01-028.prod.mesa1.secureserver.net)----- Transcript of session follows -----
... while talking to smtp.secureserver.net.:
<<< 554-p3pismtp01-006.prod.phx3.secureserver.net
<<< 554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.
... while talking to mailstore1.secureserver.net.:
<<< 554-m1pismtp01-028.prod.mesa1.secureserver.net
<<< 554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means.
554 5.0.0 Service unavailable
我记得去年和今年初曾经处理过类似问题，刚才去这里先提交了IP的解封：http://unblock.secureserver.net/ ，可能还需要到另外几个反垃圾邮件名单中检查和要求解封：
可能还需要进行一些服务器上sendmail的设置和dns的解析设置，内容以后补记。
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