Blocking Spam

[Dotan Cohen]

On 26/12/06, Tim <ignored_mailbox at yahoo.com.au> wrote:
> On Tue, 2006-12-26 at 09:08 +0000, James Wilkinson wrote:
> > Also, I'd strongly recommend training SA's Bayesian analysis, using
> > the sa-learn program. SpamAssassin won't use Bayesian analysis until
> > it has learnt 200 good ("ham") e-mails and 200 spams.
>
> Isn't that supposed to be the point of the junk/not-junk buttons on mail
> clients?
>
> > Bayesian analysis continues to be a *very* good way of analysing
> > e-mail, in my experience.
>
> Back when I was still using Windows, I used to use the in-built one that
> came with The Bat! mail client.  It seemed to do a reasonable job, and
> it was damn quick (unlike the speed of any kind of mail filtering in
> Evolution).  Though, before that, I'd knocked most spam off, without any
> false positives, with about 12 mail rules.
>

Kmail has a very decent bayesian filter called bogomail. I had to
teach it for about two weeks before it started doing any filtering
itself, with about 70 spams a day to 20 or so hams. At first it
started filtering out only the most obvious spam, but now (about two
months after first install) it only lets 2-3 spams through a day, with
no false positives so far.

But Bogofilter is my second line of defence. On the POP3 server I've
got spammassasin running, it traps about 300 spams a day, with two or
three false positives that I've discovered in the past few months.

So my 400:20 spam:ham ratio gets down to 70:20 at the server, and
further reduced to 3:20 at the Inbox. I can live with that.

Dotan Cohen

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