root 에 다음과 같은 멜이 왔는데요..
에러는 에러 같은데..
무슨 말인지..잘 모르겠거든요..
어떻게 해결해야할지..
 "
Date: Tue, 14 Nov 2000 12:42:21 +0900
From: Mail Delivery Subsystem <MAILER-DAEMON at XXX.com>
To: postmaster at XXX.com Subject: Postmaster notify: see transcript for details
 The original message was received at Tue, 14 Nov 2000 12:42:21 +0900
from localhost
with id eAE3gLa26867
    ----- The following addresses had permanent fatal errors -----
<eelee at XXX.co.kr>
    (reason: 550 Host unknown)
    ----- Transcript of session follows -----
550 5.1.2 <eelee at XXX.co.kr>... Host unknown (Name server: XXX.co.kr: host not found)
 "