메일로그 분석좀 해주실수 있나요??

Mar 12 11:48:01 mail sendmail[525]: i2C2isu5000525: from=<simon@218.49.183.228>
size=5778, class=0, nrcpts=1, msgid=<200403120247.i2C2isu5000525@mail.it-more.
o.kr>, bodytype=8BITMIME, proto=ESMTP, daemon=MTA, relay=NK219-91-20-250.adsl.p
.apol.com.tw [219.91.20.250]
Mar 12 11:48:02 mail sendmail[1073]: i2C2isu2000524: to=<dqtj@yahoo.com.tw>, de
ay=00:00:11, xdelay=00:00:06, mailer=esmtp, pri=30416, relay=mta.mail.tpe.yahoo
com. [202.1.238.208], dsn=4.0.0, stat=Deferred: 421 VS1-IP Excessive unknown re
ipients - possible Open Relay http://help.yahoo.com/help/us/mail/spam/spam-18.h
ml (#4.1.8)
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apol.com.tw [219.91.20.250]

이런식의 메일이 mqueue에 무지하게 마니 싸여여.... 미치겠어여...
/var 의 용량이 하루에 100%로 씩 되버려서 메일 mqueue삭제하구 있어여..
죄송하시만 고수님들의 조언좀 부탁드릴께요!!

redhat 9.xx 버젼 사용하구 있는데요...미치겠떠여...