[pmmail-list] Bayesian spamfiltering

[Andrew C++ Pitonyak]

I read an article about spam filtering using statistical analysis. See
http://www.paulgraham.com/spam.html

I implemented the algorithm and then setup it up to work with PMMail
under windows.

http://www.pitonyak.org

http://www.pitonyak.org/spam.php   <== A write up on how to do this in
PMMail complete with code

So far, this has worked great for me. In summary:

First, I use a white list for people I know.
After this, I apply the statistical checks on the email and make a
decision.

It seems to work great so far!

Note that I used only about 400 spam messages and about 2000 regular
email messages. 

I had good results even with only 250 spams and 500 regular email
messages.

Andrew Pitonyak



On Mon, 16 Sep 2002 07:55:26 -0700, John Bridges wrote:

>On Mon, 16 Sep 2002 16:44:34 +0200 (CDT), Winfried Tilanus wrote:
>
>>I know some other people here are expirementing with Bayesion spam
>>filtering too, do you have the same results? Has anybody gotten it to
>>work better?
>
>I use SpamAssassin (actually my ISP has it installed, but anyone with a
>Unix/Linux mail server can install it for free, I've installed it for a
>friend at his small ISP which runs on FreeBSD).
>
>I have my treshold set at a score of 5 (I believe that is the default).
>
>I scanned all my past email messages for FROM addresses, and created a
>whitelist based on those email addresses.
>
>I now get zero false positives, and usually 0 to 1 pieces of spam make it
>past SpamAssassin each day (out of 60 to 90 pieces of SPAM each day).
>
>In other words, Spam is now a complete non-issue for me.
>
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