關於用Mdaemon架mailserver,信件被退件

[REN]

小弟用mdaemon架mailserver,信件收發一向都沒問題,但總有少數信箱不接受我這發出去的信,下面是傳回的訊息,請幫我看一下是什麼原因,我該怎麼解決這問題呢?



The original message was received at Tue, 8 Apr 2003 10:30:10 +0800 (CST)
from 61-220-xxx-xx.HINET-IP.hinet.net [61.220.xxx.xx]

----- The following addresses had permanent fatal errors -----
<[email protected]>

----- Transcript of session follows -----
... while talking to mx.nyc.untd.com.:
<<< 550 Access denied....19e850....
... while talking to mx.lax.untd.com.:
>>> QUIT
<<< 550 Access denied....1747b2....
554 <[email protected]>... Service unavailable

[ryanxyz]

550 Access denied

被鎖了吧!!!

[misdavid]

被對方伺服器拒絕了喔 !!

[dryellow]

你是不是反解沒有設定，有的Mail Server是會檢查正解與反解，他發現兩個不
相同就會拒收。

[zuyan]

我想應該是MX記錄沒設好...
很多MAIL SERVER都用這個方法來擋廣告信....
亞太線上的MAIL就是用這個方法，不過它只要一個MX Recod