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아래는 메시지 내용입니다.

The original message was received at Mon, 10 Sep 2007 17:11:56 +0900
from [211.115.114.127]

----- The following addresses had permanent fatal errors -----
<****@****>
(reason: 550 5.7.1 <****@****>... Relaying denied. Proper authentication required.)

----- Transcript of session follows -----
... while talking to mail.sewit.co.kr.:
>>> DATA
<<< 550 5.7.1 <****@****>... Relaying denied. Proper authentication required.
550 5.1.1 <****@****>... User unknown
<<< 503 5.0.0 Need RCPT (recipient)

Reporting-MTA : dns; smail-110.hanmail.net
Arrival-Date : Mon, 10 Sep 2007 17:11:56 +0900

Final-Recipient: RFC822; ****@****
Action: failed
Status: 5.7.1
Remote-MTA: DNS; mail.sewit.co.kr
Diagnostic-Code: SMTP; 550 5.7.1 <****@****>... Relaying denied. Proper authentication required.
Last-Attempt-Date: Mon, 10 Sep 2007 17:11:58 +0900