고수님 도움을...ㅡ.ㅡ

Mar 18 12:16:46 ns sendmail[806]: h2I3Gkx00806: from=nobody, size=938, class=0, nrcpts=1, msgid=<200303180316.h2I3Gkx00806@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:16:51 ns sendmail[812]: h2I3Gpf00812: from=nobody, size=940, class=0, nrcpts=1, msgid=<200303180316.h2I3Gpf00812@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:16:56 ns sendmail[818]: h2I3GuB00818: from=nobody, size=937, class=0, nrcpts=1, msgid=<200303180316.h2I3GuB00818@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:01 ns sendmail[822]: h2I3H1h00822: from=nobody, size=940, class=0, nrcpts=1, msgid=<200303180317.h2I3H1h00822@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:07 ns sendmail[827]: h2I3H7i00827: from=nobody, size=938, class=0, nrcpts=1, msgid=<200303180317.h2I3H7i00827@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:11 ns sendmail[831]: h2I3HB900831: from=nobody, size=939, class=0, nrcpts=1, msgid=<200303180317.h2I3HB900831@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:17 ns sendmail[835]: h2I3HGo00835: from=nobody, size=939, class=0, nrcpts=1, msgid=<200303180317.h2I3HGo00835@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:21 ns sendmail[840]: h2I3HLa00840: from=nobody, size=943, class=0, nrcpts=1, msgid=<200303180317.h2I3HLa00840@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:27 ns sendmail[844]: h2I3HRg00844: from=nobody, size=941, class=0, nrcpts=1, msgid=<200303180317.h2I3HRg00844@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:31 ns sendmail[848]: h2I3HVn00848: from=nobody, size=938, class=0, nrcpts=1, msgid=<200303180317.h2I3HVn00848@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:37 ns sendmail[853]: h2I3HbI00853: from=nobody, size=938, class=0, nrcpts=1, msgid=<200303180317.h2I3HbI00853@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:41 ns sendmail[857]: h2I3HfQ00857: from=nobody, size=934, class=0, nrcpts=1, msgid=<200303180317.h2I3HfQ00857@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:46 ns sendmail[863]: h2I3HkM00863: from=nobody, size=940, class=0, nrcpts=1, msgid=<200303180317.h2I3HkM00863@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:51 ns sendmail[867]: h2I3HpN00867: from=nobody, size=939, class=0, nrcpts=1, msgid=<200303180317.h2I3HpN00867@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost
Mar 18 12:17:56 ns sendmail[874]: h2I3Huc00874: from=nobody, size=938, class=0, nrcpts=1, msgid=<200303180317.h2I3Huc00874@dongdo.net>, bodytype=8BITMIME, relay=nobody@localhost

메일로그에 다음과 같이 쌓이면서.. 스팸메일이 엄청 발생했습니다.

그래서 서버도 다운될정도... 위에 내용이 무엇이고..

어떤 이유때문인지 알수 없을까요?

스팸메일은 차단해 두었는데.

고수님들 답변부탁합니다.