steve radich nsixeabitshopcom sorry apparently unclear mx records im saying follows 100 real 200 real perhaps many real want 300 bogus one blocks port 25 tcp reset example 400 accept port logs ip blacklist scored aggressively 421retry whole bunch places seeing smtp server hitting 400 level mx im saying seems like useful thing included blacklist using low score sa point offer 400 level mx free service log ips quickly dont want set server theory 400 level mx wouldnt used real smtp often hence likely spammer therefore ip could auto blacklisted realize im proposing block score based list steve radich httpwwwaspdevelopernet httpwwwvirtualserverfaqcom bitshop inc development training hosting troubleshooting httpwwwbitshopcom original message mouss mailtoqpeqrnetoyennet sent thursday february 21 2008 825 pm cc zqoqispamassassinapacheorg subject bogus mx blacklist service viable mcdonald dan wrote thu 20080221 2158 0100 raymond dijkxhoorn wrote hi provide hosted ie im thinking offering instead log somehow feed create blacklist based im familiar blacklists many network smtp logging side easy implement im thinking make public free service gather data blacklist anyone could list mx whats wrong httpwwwrfcignorantorgtoolssubmit_formphptablebogusmx wrong direction lists domains dont mx records set properly ip addresses attempt send mail sites mx records difference force servers retry time connect server find people talk short well bl unless ask ietf modify smtp adding knocking requirement thu 07 aug 2008 115221 0500 bogus mx blacklist service viable