Re: [Asrg] Re: RMX Records

["Chris Lewis" <clewis@nortelnetworks.com>]

Vernon Schryver wrote:

> People whose livelihoods depend on mail cannot, will not, and do not
> accept false positive rates above 1%.
We have to remember, however, that the "true" false positive rate isn't 
determined _solely_ by how much legitimate email your filters block, but 
by the amount of legitimate email that doesn't get through.

They may seem to be the same, but it isn't.

A full bore TMDA (all first time email carries a "click this link to let 
the email through") has a 100% false positive rate in the filters first 
go-round. But if the senders follow the instructions, it's 100% delivery 
in the end.  [Presuming it works as it's supposed to, and you don't have 
senders with broken mailers that can't see/display the returns.]

Discussions of false positives has to take into account what you do with 
a reject, and the practises you follow to rectify problems.

Yes, my management would draw and quarter me if our false positive rate 
got above even .01%. It is.  False positive handling is part of the 
insurance to make sure that we eventually do deliver all legitimate email.

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