Well... You're light on details, but from the few clues you've given, is it possible you've (re-)invented a genetic algorithm for spam classification?
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5982390&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5982390 http://teaching.csse.uwa.edu.au/year4/Current/Students/Files/2007/JamesDudley/CorrectedDissertation.pdf There are quite a few research papers on this. Anyway, I can't test out your method, but I'll sure keep an eye on how things evolve. :) Regards, Dianne.