안녕하세요!

특정 daum 메일에서 메일을 보내면 아래와 같이 무조건 반송된다고 하는데 이유가 뭔지 궁금합니다??

다른 daum메일들은 다 잘됩니다. 

수신, 발신 어느쪽 ?? 어느쪽 잘못인지요??

알려주시면 감사하겠습니다..

안녕히 계세요...

메일이 아래와 같이 반송되는데 이유가 뭔가요??


The original message was received at Tue, 11 Jun 2013 18:38:30 +0900
from [116.124.131.58]

----- The following addresses had permanent fatal errors -----
****@****
(reason: 554 5.7.1 Mail from this email address is not allowed and has been blocked.(no.14 pattern matched))

----- Transcript of session follows -----
... while talking to xxx.xx.:
>>> DATA
<<< 554 5.7.1 Mail from this email address is not allowed and has been blocked.(no.14 pattern matched)
554 5.0.0 Service unavailable

Reporting-MTA : dns; smail-35.hanmail.net
Arrival-Date : Tue, 11 Jun 2013 18:38:30 +0900

Final-Recipient: RFC822; ****@****
Action: failed
Status: 5.7.1
Remote-MTA: DNS; xxx.xx

Diagnostic-Code: SMTP; 554 5.7.1 Mail from this email address is not allowed and has been blocked.(no.14 pattern matched)
Last-Attempt-Date: Tue, 11 Jun 2013 18:38:30 +0900