> ez sokat segíthet.
de meg tobbet arthat...
sajat tapasztalatom, hogy a nagyobb szolgaltatok (t-online, hotmail stb) szinte mindig bennevannak 2-3 ilyen blacklistben, mert valamelyik useruk spammel es emiatt belekerulnek a teljes ip tartomanyukkal. en emiatt ceges szervereken eleve kerulom az rbl-ek hasznalatat (1 ugyfel levelenek elvesztese nagyobb kar lehet mint 100 spam)...
elsore durvanak tunik, de eleg kozel van a valosaghoz:
http://www.paulgraham.com/sblbad.html
http://www.paulgraham.com/falsepositives.html
"Blacklists have been around for years. If they worked, we'd know by now. But according to a recent study, the MAPS RBL, probably the best known blacklist, catches only 24% of spam, with 34% false positives. It would take a conscious effort to write a content-based filter with performance that bad." ...
A'rpi