메일 보내는 건 되는데 받는게 안되네요...
다음과 같은 리턴 메일이 오구요...

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The original message was received at Fri, 25 Apr 2003 11:35:55 +0900
from [211.32.117.36]

----- The following addresses had permanent fatal errors -----

(reason: 550 5.7.1 Unable to relay for ****@****)

----- Transcript of session follows -----
... while talking to plansoft.co.kr.:
>>> DATA
<<< 550 5.7.1 Unable to relay for ****@****
550 5.1.1 ... User unknown
<<< 554 5.5.2 No valid recipients

Reporting-MTA: dns; smail-104.hanmail.net
Arrival-Date: Fri, 25 Apr 2003 11:35:55 +0900

Final-Recipient: RFC822; ****@****
Action: failed
Status: 5.7.1
Remote-MTA: DNS; plansoft.co.kr
Diagnostic-Code: SMTP; 550 5.7.1 Unable to relay for ****@****
Last-Attempt-Date: Fri, 25 Apr 2003 11:35:59 +0900

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