▷ 제품버젼 :

▷ 오류발생 메뉴/주소 :

▷ 에러메세지 :

Original-Envelope-Id: 2a446f3e18abbd998f5409f5657b4b6a$****@****

Reporting-MTA: dns; mailtx3.nate.com

Arrival-Date: Thu, 1 May 2014 15:29:09 +0900

Original-Recipient: rfc822;<****@****>

Final-Recipient: RFC822; ****@****

Action: failed

Status: 5.1.1

Remote-MTA: DNS; clarkgogo.com

Diagnostic-Code: SMTP; 550 User unknown <****@****>

Last-Attempt-Date: Thu, 1 May 2014 15:29:15 +0900

The original message was received at Thu, 1 May 2014 17:23:03 +0900
from [10.234.214.41]

----- The following addresses had permanent fatal errors -----
< ****@****>

----- Transcript of session follows -----
550 5.1.2 <****@****>... Host unknown (Name server: 14.63.175.193.clarkgogo.com.: host not found) 

▷ 질문내용 :

메일서버 -> 포탈로 보내는건 잘되는데 

포탈에서 -> 메일서버로 보내느건 잘안되는데 어디설정을 바꿔야 할가요