On 10/11, Alessio Cecchi wrote:
> I'm an italian user of spamassassin. During the last 3 weeks many
> spam email have rating cut down by the rules "RCVD_IN_DNSWL_MED".
> Also BAYES_99 can to nothing against this :-(
>
> For now I solved the problem by disable this check, but is a common
> problems for many italian users.

(I'm an inactive dnswl.org admin.)

The effectiveness of all spam filtration is highly dependent on having
people providing data to the system in the languages it's used on.  I bet
both DNSWL and SpamAssassin would benefit from you feeding them data.
I suspect neither have *any* data from Italy, which would result in
terrible accuracy in Italy.

I suspect spamassassin is terrible in most non-English languages due to a
lack of non-English speaking people providing data via masscheck:  
http://wiki.apache.org/spamassassin/NightlyMassCheck
Rule scores are calculated from data submitted this way, so all of the
accuracy of spamassassin depends on it.  Except for bayes.  I bet you're
heavily dependent on bayes due to lack of Italian email data via masscheck.
You don't actually send in your mails, just the score hits, so it's not a
privacy problem.  Currently this data is only coming from about 10 people.
Amazing it works.  Actually, currently, it doesn't work.  Score
re-generation isn't happening due to a problem preventing processing of
masscheck data from 3 more people (bug 6671).  So what's amazing is that
it works usefully when data from all 13 of those people is available.  So,
be #14 and make spamassassin more accurate.  When bug 6671 is fixed.

To report abuse to dnswl.org, on http://www.dnswl.org/ there is a "Report
Abuse" section in the right column.  I wrote a spamassassin plugin
which might make it easier to report spam that matches dnswl rules:
http://www.chaosreigns.com/dnswl/sa_plugin/

And I have my own IP reputation project that could use your data:
http://www.chaosreigns.com/iprep/

-- 
"If you want to make an apple pie from scratch, you must first create
the universe." - Carl Sagan
http://www.ChaosReigns.com

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