Tim Peters wrote:
Since deciding on the largest acceptable false positive rate is far more a social than a technical issue, a group of nerds will do anything rather than face it <wink>.
I think we pretty much ran out of things to do. :-) Still, I think the acceptable rate depends heavily on what happens to the rejects. If they go to /dev/null then it would have to be very low. If there are bounces and a way for the innocent victims to bypass the filter then I consider 0.5% good enough for most situations. The major remaining problem would be handing legitimate automated email. For mailing lists that probably isn't an issue.
I'm probably not the guy to listen to about acceptable rates, though. I currently use TMDA and therefore am a heartless bastard. :-)