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spamassassin-users: Re: Getting started with Bayesian filtering

Re: Getting started with Bayesian filtering

From: <darxus_at_nospam>
Date: Mon Oct 24 2011 - 01:23:17 GMT

On 10/23, Marios Titas wrote:
> my $spamassassin=Mail::SpamAssassin->new({
> require_rules => 1,

I have no experience using SA this way. I'd start with trying to get it to
work with the default configuration, from the command line, not through
this API.

> rules_filename => "$ENV{HOME}/.spamassassin/user_prefs",

First thing I'd try is just commenting out that line. I bet it'll work.

> score BAYES_05 9

It looks like you're not loading the full default ruleset, which is
probably good. But it looks like then you're not defining the BAYES
rules, which you need - just setting that one score for an undefined rule.
I bet if you ran spamassassin --lint with those same settings
(rules_filename, etc.), it would complain about you setting a score for an
undefined rule.

Grep the default rules for BAYES:

body BAYES_00 eval:check_bayes('0.00', '0.01')
body BAYES_05 eval:check_bayes('0.01', '0.05')
body BAYES_20 eval:check_bayes('0.05', '0.20')
body BAYES_40 eval:check_bayes('0.20', '0.40')
body BAYES_50 eval:check_bayes('0.40', '0.60')
body BAYES_60 eval:check_bayes('0.60', '0.80')
body BAYES_80 eval:check_bayes('0.80', '0.95')
body BAYES_95 eval:check_bayes('0.95', '0.99')
body BAYES_99 eval:check_bayes('0.99', '1.00')
tflags BAYES_00 nice learn
tflags BAYES_05 nice learn
tflags BAYES_20 nice learn
tflags BAYES_40 nice learn
tflags BAYES_50 learn
tflags BAYES_60 learn
tflags BAYES_80 learn
tflags BAYES_95 learn
tflags BAYES_99 learn
score BAYES_00 0 0 -1.5 -1.9
score BAYES_05 0 0 -0.3 -0.5
score BAYES_20 0 0 -0.001 -0.001
score BAYES_40 0 0 -0.001 -0.001
score BAYES_50 0 0 2.0 0.8
score BAYES_60 0 0 2.5 1.5
score BAYES_80 0 0 2.7 2.0
score BAYES_95 0 0 3.2 3.0
score BAYES_99 0 0 3.8 3.5
priority BAYES_99 -400

I wonder what "priority" does. You probably don't want the "learn" flags.

Oh, hah, none of the BAYES scores are high enough to go above your
required_score of 5. So you'll probably want to set your required_score to
something within the range of scores defined there, or change the scores.

> Could someone give me any pointers on how to make this work? All I
> want is to be able to use Bayesian filtering and Bayesian filtering

I'd probably try a dedicated bayesian filter, maybe spamprobe. Although
there might not be a reason not to use SA. Especially if you like that

If you get this working, I'd appreciate it if you documented it on the SA

-- "When we remember we are all mad, the mysteries of life disappear and life stands explained." - Mark Twain