[Techtalk] spam filters

[Maria McKinley]

Hi there,

I am currently using spamassasin to filter spam on our mail server. 
Lately it has not been doing a very good job. I keep trying to update 
it, but I always seem to be at the latest release. Does anyone have any 
suggestions? Either an alternate spam filter or some secret knob to turn 
to make it work better? ;-) I have the spam level at 5 right now, but I 
  don't think turning it further down would help much, because most of 
the spam getting through seems to be a 2.5 or less (and a depressing 
amount of them are at 0!). Any advice? Has anyone tried turning it down 
as low as a 2? What sort of false positives do you get?

thanks,
maria