text_combined: mouss qpeqrnetoyennet sven juergensen kielnet wrote hi list im currently considering ways deal customer spambots putting smtpips every several blacklists would appreciate input aside forcing everyone use smtpauth trails ton support im thinking rate limiting using cidrwhitelist combination regexpblacklist allowing valid sender addresses corresponding domain permitting defined range ipaddresses rejecting every mail usersyntax using nicely bypasses like 90 spam generated customers ran warn_if_reject regexp works quite well apparent false positives aside rfcignorance anything worry something else would make endeavour rather painful experience whatever way rfc issue _you_ decide mail relay indeed limit relay cases ip sender corresponds valid customer ask customer format use sender expression matches addresses use course doesnt solve problem malware uses valid sender addresses suggested witese use policyd particular throttling feature fri 08 aug 2008 135040 0100 rfcignorant