前幾天發現一台Linux服務器的網站上發來的郵件突然很少甚至沒有了，可能導緻客戶聯系不上，檢查發現/var/spool/mail目錄下root中有一些沒有發出的郵件，其中說到：
----- 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
我記得去年和今年初曾經處理過類似問題，剛才去這裡先提交了IP的解封：http://unblock.secureserver.net/ ，可能還需要到另外幾個反垃圾郵件名單中檢查和要求解封：
可能還需要進行一些服務器上sendmail的設置和dns的解析設置，内容以後補記。
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