請問各位先進，小弟的sednamil已經半年了，一直以來都沒有問題，直到上禮拜
有所謂的求職信病毒後，發現寄信出去都會被退件，但 550的錯誤訊息是沒有user存在，但明明寄信的對象是存在的。
The original message was received at Tue, 23 Apr 2002 15:48:40 +0800
from win2000 [192.168.0.22]
----- The following addresses had permanent fatal errors -----
<abc@domain.com>
(reason: system config error)
----- Transcript of session follows -----
... while talking to mail.domain.com.:
>>> MAIL From:<xyz@seed.net.tw> SIZE=1157
<<< 452 4.4.5 Insufficient disk space; try again later
553 5.3.5 office.domain.com. config error: mail loops back to me (MX problem?)
554 5.3.5 <abc@domain.com>... Local configuration error
