Re: qsf

On 11 Jan 2007, Darxus-5+gNnNaL/BD/[email protected] wrote:
> On 01/11, Anthony Campbell wrote:
> > >From my limited experience so far, I'd say run qsf and spamprobe
> > together. Currently I'm using spamprobe to catch whatever qsf misses,
> > which is about 5 or 6 a day after very limited training (about 150
> > spams). They seem to complement each other well. I'm seeing no spams at
> > all and no false positives. 
> 
> Wait, you're saying that if either of them flags an email as spam, you
> believe them?  So you're effectively just... doubling your false positive
> rate?
> 
> I do run two filters together - spamprobe and spamassassin.  But the
> way I do it, if they agree it's spam it goes to a spam folder and I
> never look at it.  If they agree it's not spam it goes to my inbox.
> If they disagree it goes to a folder named after the one that caught it,
> and I check those folders for false positives.  Works wonderfully.  Don't
> think I've ever had a false positive from both on one email, and they
> rarely both miss a spam.  (This filtering is done in procmail.)
> 

What I do is very similar. If spamprobe thinks it's spam it goes into
one folder; the remainder then go through qsf and if any are then
thought to be spam they go into a different folder. I'm doing it this
way to monitor the effects; later they may all go into the same folder
for ease of checking.


> But the advantage there, I believe, is in the fact that they are two
> different types of filters.  Any benefit from running two filters as
> similar as spamprobe and qsf (both multi-word token bayesian filters) I
> would have to assume could be achieved by using just one with a different
> configuration.  
> 
> How did you find qsf?
> 

I'd say its effectiveness is about the same as spamprobe's. But it seems
to better at catching ones that I see a lot: these are porn sites with
an html link in the body and perhaps one line of random text. 

I had also thought that qsf would be too similar to spamprobe for the
combination to be effective, but the author of qsf thought it would be
worth while running them together and so far I think he's right.

Anthony

-- 
Anthony Campbell - ac-MeA/[email protected] 
Microsoft-free zone - Using Linux Gnu-Debian
http://www.acampbell.org.uk (blog, book reviews, 
on-line books and sceptical articles)


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