blackhole list........;;;;;;;;;

사내메일서버를 운영중인데요..
오늘갑자기 잘보내지던 메일이 리턴되어서 왔더라구요..
아래와같이...

The original message was received at Wed, 14 Apr 2004 11:36:51 +0900
from [211.250.5.253]

----- The following addresses had permanent fatal errors -----
wick@thomson.net>
(reason: 550 5.7.1 Mail from at xxx.xx.xxx.xxx refused by blackhole list. Please refer to http://mail-abuse.org/referred.html)

----- Transcript of session follows -----
... while talking to mail.tce.com.:
>>> MAIL From:<admin@cl-post.com>
<<< 550 5.7.1 Mail from at xxx.xx.xxx.xxx refused by blackhole list. Please refer to http://mail-abuse.org/referred.html
554 5.0.0 Service unavailable

블랙홀리스트에 포함되어져있기때문에 차단이 되었다는것같은데여..
맞나여... 빠져나올려면 어떻게해야하는지..ㅡㅡ;;
아시는분 답변좀..부탁합니다..