daniel quinlan quinlanpathnamecom justin mason wrote interestingly seem apparently encrypted versions recipient email address see rot13 yr address grep spam archive therell least 1 hit theo van dinter writes hmmm im surprised results especially since seeing false positives lot matches though still worthwhile 1257 bad results overall spam nonspam rank score name 11774 4079 7695 035 000 000 messages 100000 34644 65356 035 000 000 messages 0195 0564 0000 100 075 100 t_rot13_email_3 0161 0466 0000 100 073 100 t_rot13_email_2 0161 0466 0000 100 073 100 t_rot13_email interesting thing hits seem rot13 versions address ever start getting fps anyone worried could make eval test rot13 address turning nonword characters characters regular expression time might worth testing username html comments found types html comments havent seen enough hits far bother however add really good test email addresses comments dan 01 oct 2002 192216 0700 sadev razorusers mutating spam