▷ 질문내용 :

다음메일에서 저희쪽 메일로 발송을 했는데 계속 반송 됩니다. 

반송메일 내용은 

The original message was received at Wed, 4 Jul 2012 16:49:23 +0900
from [116.124.131.67]

----- The following addresses had permanent fatal errors -----
<****@****>
(reason: )

----- Transcript of session follows -----
... while talking to mail.hanteo.co.kr.:
>>> RCPT To:<****@****>
<<< 421 your ip filtered by rbl! (IP:211.43.197.215)(listed by "cblless.anti-spam.org.cn.")
<****@****>... Deferred: 421 your ip filtered by rbl! (IP:211.43.197.215)(listed by "cblless.anti-spam.org.cn.")
Message could not be delivered for 1 hour
Message will be deleted from queue

Reporting-MTA : dns; smail-33.hanmail.net
Arrival-Date : Wed, 4 Jul 2012 16:49:23 +0900

Final-Recipient: RFC822; ****@****
Action: failed
Status: 4.4.7
Remote-MTA: DNS; mail.hanteo.co.kr
Diagnostic-Code: SMTP; 
Last-Attempt-Date: Wed, 4 Jul 2012 17:50:47 +0900

이렇게 왔구요.

근데 특이한건 아이디를 다르게 해서 다음메일에서 발송하면 도착하고 있습니다.

전에 메일교환기 주소가 ip로 잡힌것이 문제라고 해서 변경했는데

왜 이러는걸까요?