The original message was received at Mon, 3 Dec 2001 19:27:56 +0900
(KST)
from [211.58.60.20]
    ----- The following addresses had permanent fatal errors -----
<userid at hanmail.net>
    ----- Transcript of session follows -----
... while talking to mx8.hanmail.net.:
>>> MAIL From:<userid at co.kr> SIZE=912
<<< 501 5.1.8 Sender domain must exist(co.kr)
501 <userid at hanmail.net>... Data format error
 위의 에러를 보시면 userid at co.kr 이라고 나옵니다.
황당 ~ 원인이 몰까요???