스팸메일을 어떻게 막아야 할까요?

안녕하십니까? 오늘과내일의 홍석범입니다.

제목으로 보아. 님의 서버에서 대규모의 피싱 메일이 발송되고 있는 것 같습니다.
이러한 경우 대부분, 웹응용프로그램의 취약성을 이용하여 스팸이 발송되는 경우입니다. 이러한 경우 서버상에서 현실적으로 취할 수 있는 보안 설정이라는 것이 무의미합니다.
웹로그등을 보시어 제로보드나 온라인주문서등 웹응용프로그램의 취약성을 보완하셔야 할 것 같습니다.

일단, 급하신대로 외부로 나가는 메일을 차단하시거나
(# iptables -A OUPUT -p tcp --dport 25 -j DROP)
/var/spool/clientmqueue/ 와 /var/spool/mqueue 에서 피싱 관련 파일을 삭제하시기 바랍니다.

감사합니다.

김재혁 님의 글

find ./ -type f -exec grep 'Subject' {} /dev/null ;

이렇게 검색을 해보니 아래와 같이 끝도없이 나오네요.

전에 스팸메일 발송된다고 idc에서 연락받고 데몬을 내리고 리눅스 서버관리 실무 바이블을 보고 몇가지 보안설정을 일단 해놓긴 했는데 sendmail 데몬만 올리면 문제가 발생합니다. 어떻게해야 할까요

./qfkBMLnRm8026470:H??Subject: eBay Registration On Hold
./qfkBILcDDW028738:H??Subject: eBay Registration On Hold
./qfkBL0ulxh011510:H??Subject: eBay Registration On Hold
./qfkBN9amr6020221:H??Subject: eBay Registration On Hold
./qfkBKNHphr005095:H??Subject: eBay Registration On Hold
./qfkBG8tVJb018317:H??Subject: eBay Registration On Hold
./qfkBHLm8qe029757:H??Subject: eBay Registration On Hold
./qfkBNCRq0X004678:H??Subject: eBay Registration On Hold
./qfkBMFKfla027016:H??Subject: eBay Registration On Hold
./qfkBHDqJYF024112:H??Subject: eBay Registration On Hold
./qfkBMMZr6t000856:H??Subject: eBay Registration On Hold
./qfkBFLPaYe001881:H??Subject: eBay Registration On Hold
./qfkBJLcTr0029539:H??Subject: eBay Registration On Hold
./qfkBN8WSZ9012001:H??Subject: eBay Registration On Hold
./qfkBMFhI4D028338:H??Subject: eBay Registration On Hold
./qfkBKMnLJE001924:H??Subject: eBay Registration On Hold
./qfkBFJ8lSN021954:H??Subject: eBay Registration On Hold
./qfkBGA6nrF025446:H??Subject: eBay Registration On Hold
./qfkBMG2agc029563:H??Subject: eBay Registration On Hold
./qfkBN9l1B4021586:H??Subject: eBay Registration On Hold
./qfkBGBRoIR000568:H??Subject: eBay Registration On Hold
./qfkBFMSnZO010478:H??Subject: eBay Registration On Hold
./qfkBG73p1g010290:H??Subject: eBay Registration On Hold
./qfkBEITFcT029181:H??Subject: eBay Registration On Hold
./qfkBK5dMdM029742:H??Subject: eBay Registration On Hold
./qfkBG8DGOd014279:H??Subject: eBay Registration On Hold
./qfkBEHuQOc027131:H??Subject: eBay Registration On Hold
./qfkBHMHs1W002293:H??Subject: eBay Registration On Hold
./qfkBJMXkcc002967:H??Subject: eBay Registration On Hold
./qfkBH2dX79010536:H??Subject: eBay Registration On Hold
./qfkBK5J0Qm028589:H??Subject: eBay Registration On Hold
./qfkBNAtM52029171:H??Subject: eBay Registration On Hold
./qfkBH95Qu9002843:H??Subject: eBay Registration On Hold
./qfkBL2C16t015733:H??Subject: eBay Registration On Hold
./qfkBNIitrK031832:H??Subject: eBay Registration On Hold
./qfkBG5A7dh004185:H??Subject: eBay Registration On Hold
./qfkBJH8MHp006791:H??Subject: eBay Registration On Hold
./qfkBNKCiXA009226:H??Subject: eBay Registration On Hold
./qfkBHBsQb9017029:H??Subject: eBay Registration On Hold
./qfkBFLXlJR003083:H??Subject: eBay Registration On Hold
./qfkBJ7pmFq006722:H??Subject: eBay Registration On Hold
./qfkBJN8LhC006603:H??Subject: eBay Registration On Hold
./qfkBLLpFUx022300:H??Subject: eBay Registration On Hold
./qfkBHKmTJR020247:H??Subject: eBay Registration On Hold
./qfkBJM3aKU032563:H??Subject: eBay Registration On Hold
./qfkBEHx64Q027239:H??Subject: eBay Registration On Hold
./qfkBELTBZX012109:H??Subject: eBay Registration On Hold
./qfkBNHj8Ae027261:H??Subject: eBay Registration On Hold
./qfkBN2JqmV022306:H??Subject: eBay Registration On Hold
./qfkBKMGnAc030513:H??Subject: eBay Registration On Hold
./qfkBEA6V3S000334:H??Subject: eBay Registration On Hold
./qfkBNKhaCn012406:H??Subject: eBay Registration On Hold
./qfkBFMqoLL013250:H??Subject: eBay Registration On Hold
./qfkBL9svr5009688:H??Subject: eBay Registration On Hold
./qfkBG9hwWT023007:H??Subject: eBay Registration On Hold
./qfkBHMlYXo007520:H??Subject: eBay Registration On Hold
./qfkBLLfdGa021097:H??Subject: eBay Registration On Hold
./qfkBGMP63D018530:H??Subject: eBay Registration On Hold
./qfkBNJrQja007482:H??Subject: eBay Registration On Hold
./qfkBG9C3va020166:H??Subject: eBay Registration On Hold
./qfkBJH7UVO006768:H??Subject: eBay Registration On Hold
./qfkBECB8E7007289:H??Subject: eBay Registration On Hold