text_combined: marc perkel vrvaperkelcom steve radich wrote 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 im actually something like track hits highest mx hit lowest numbered mx use exim track ip addresses dont send quit command close connection combination creates highly reliable blacklist im currently tracking 11 million virus infected spambots tried spam last 4 days hostkarma list thu 07 aug 2008 085656 0800 bogus mx blacklist service viable