Filter breakers

[Stephen Davies]

G'day David.
Interesting response, thank you. My original word base was a mixture of many 
tens of thousands of hams and spams and over the years that  I only 
registered new spam, everything worked beautifully.

I don't see how it could be relevant but it is only since I started 
registering new hams as well that I have been getting so many spams getting 
through.

Cheers,
Stephen
On Sunday 10 February 2008 15:36, you wrote:
> On Sun, 10 Feb 2008 10:45:50 +1030
>
> Stephen Davies wrote:
> > I have been using bogofilter (currently 1.1.5) with Amavis and milter
> > for a number of years now with great success.
> > Every day, several hundred spams are successfully detected and zero
> > hams get filtered.
> > However, recently I have been having quite a number of spams getting
> > through to my inbox.
> > They all seem to be very small messages in three or four categories
> > but despite my rerunning each case with bogofilter -Ns at least four
> > times, they keep on getting through.
> >
> > The only change I have made to my configuration recently is to start
> > registering hams. Previously, I only registered spams.
> >
> > My database is some 200Mb.
> >
> > Any ideas as to what is happening here?
> >
> > TIA,
> > Stephen Davies
>
> H'lo Stephen,
>
> Bogofilter needs a mixture of ham and spam to be effective.  Training
> with both ham and spam provides info needed to decide if a new message
> is one or the other.  The general wisdom is that there needs to be a
> reasonable ratio between the number of spam messages and the number of
> ham messages used in training.  Training only with spam skews the
> wordlist and is not recommended.
>
> FWIW, my wordlist has accumulated tokens from approx 762000 spam and
> 156000 ham.  Bogofilter is currently processing approx 2000 spam per
> day and less than 1 a day is classified as unsure.
>
> Bottom line, train more ham.
>
> HTH,
>
> David

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