text_combined: mark martinec xjukpdhxtcwlclorxjugvcceaschallengecc attaining 20 sent mails per second possible attain requirement amavisnew way tweak amavisdnew clamd virus scanner internal amavisd decoding barely single host spamassassin checking enabled performance goes radically need split mail traffic across parallel servers see httpwwwijssisoftwareamavisdamavisdnewmagdeburg20050519pdf benchmarking mark thu 07 aug 2008 145336 0100 attaining 20 sent mails per second