The original message was received at Tue, 5 Oct 2004 13:26:42 +0900
from [211.233.31.20]

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

----- Transcript of session follows -----
<****@****>... Deferred: Name server: test.co.kr: host name lookup failure
Message could not be delivered for 1 hour
Message will be deleted from queue

Reporting-MTA: dns; smail-7.hanmail.net
Arrival-Date: Tue, 5 Oct 2004 13:26:42 +0900

Final-Recipient: RFC822; ****@****
Action: failed
Status: 4.4.7
Remote-MTA: DNS; test.co.kr
Last-Attempt-Date: Tue, 5 Oct 2004 14:29:22 +0900

헤당 DNS에 MX 레코드셋을 mail.test.co.kr 주었는데

왜 이런 메세지가 나오는 것일까요?