tim peters wrote if you ve still got the summary files please cvs up and try running URL again in the process of generalizing URL you managed to make it skip half the lines wink woops i didn t have the summary files so i regenerated them using a slightly different set of data here are the results of enabling the received header processing false positive percentages NUMBER NUMBER NUMBER NUMBER won NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER won NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER tied NUMBER NUMBER NUMBER NUMBER tied NUMBER NUMBER NUMBER NUMBER won NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER won NUMBER NUMBER won NUMBER times tied NUMBER times lost NUMBER times total unique fp went from NUMBER to NUMBER won NUMBER NUMBER false negative percentages NUMBER NUMBER NUMBER NUMBER won NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER tied NUMBER NUMBER NUMBER NUMBER won NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER won NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER won NUMBER NUMBER NUMBER NUMBER NUMBER NUMBER tied won NUMBER times tied NUMBER times lost NUMBER times total unique fn went from NUMBER to NUMBER won NUMBER NUMBER my test set is different than tim s in that all the email was received by the same account also my set contains email sent to me not to mailing lists i use a different addresses for mailing lists if people cook up more ideas i will be happy to test them neil 