On Sun, 2009-09-13 at 20:57 +0100, RW wrote:
> On Sun, 13 Sep 2009 14:19:35 +0100
> Clunk Werclick <mailbacku...@googlemail.com> wrote:
>
> > On Sun, 2009-09-13 at 14:06 +0100, RW wrote:
> > > On Sun, 13 Sep 2009 06:56:27 +0100
> > > Clunk Werclick <mailbacku...@googlemail.com> wrote:
> > >
> > {trimmed down to the relevant point you make}
> > > Adding irrelevant text to a spam may make it less likely likely to
> > > be caught,
> > Thank you. So if your bayes 'good' tokens that happen to catch on this
> > 'irrelevant' text, the result of having the bayes is near pointless.
> > For example, something like this:
>
> In practise I find it doesn't make much difference unless the spammer
> makes a significant effort to reduce the number of spammy tokens, both
> in the headers and the body. And that commonly leads them into hitting
> other rules, and constrains the number of spams that can be sent from
> the same IP address. The majority of the spams I get don't have such
> text and most that do still hit BAYES_99. It's obviously not such a
> powerful technique as you think.
>
>
> It's also wrong to assume that when spam hits BAYES_50, BAYES hasn't
> done anything useful. This is a fallacy that comes from the arbitrary
> assignment of zero to BAYES_50. If you add 2.599 to all the BAYES rules
> and than multiply all the rule scores by 0.658 you get an equivalent
> scoreset (i.e. one that produces the same classifications) in which
> zero is assigned to BAYES_00 instead. We than have:
>
> BAYES_00 0.00
> BAYES_50 1.71
> BAYES_99 4.01
>
> In this scoreset BAYES_50 actually looks like a fairly strong result
> (which it is).
OK, I won't dismiss it out of hand and I'm open to observation. So, I'll
give bayes a whirl. I must confess that I found the documentation on the
simple act of enabling it less than ideal and reference to
"use_bayes_rules" is currently missing in action. I've cobbled together:
# Enable the Bayes system
use_bayes 1
use_bayes_rules 0
bayes_path /home/mail/bayes/bayes
bayes_file_mode 0777
# Enable Bayes auto-learning
bayes_auto_learn 0
And trained some spam and I'll see how we get on.
--
-----------------------------------------------------------
C Werclick .Lot
Technical incompetent
Loyal Order Of The Teapot.
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