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> But the problem is that spamassassin performs all the tests and not
> only that specified in the user_prefs file .Is it a standart procedure
> by SpamAssassin.

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> * murph <vangelob@in.tum.de> wrote:
> [..]
>
> SpamAssassin always uses all available tests (except non-local checks
> like e.g. DNS blacklists, which can be disabled separately). If you
> don't want to use some specific tests, you can adjust their scores
> in your ~/.spamassassin/user_prefs file to 0.
>
> See the SpamAssassin home page for further documentation.
>
> - Sebastian

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>Sebastian Jaenicke <sjaenick@techfak.uni-bielefeld.de> wrote in message news:<slrnbsq2q7.8ko.sjaenick@azathoth.jaenicke.org>...
>thank you for the help
>now everything looks OK
>i have some more questions
>1) Why the spamer use invisible fonts in HTML

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>i thought that is from the generator of the email, something like the
>ID of the email .But i saw a spam mail and the words were not without
>sense ?

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>2) I want to add some new tests to Spamassassin
>Is it possible and how can i do it ?
>Should i change the /usr/share/spamassassin/ files ?

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> On 4 Dec 2003 07:40:04 -0800, vangelob@in.tum.de (murph) wrote:
>
>
> So you can't see the words when you open the message.
>
>
> Many spamkiller programs compare the email in question to a known database of
> spam emails, and grade the sample email according to if it matches or not.
> Spammers know this, and try to make their spam email different enough from the
> known spam so as to not be caught by this comparison technique. They do this by
> adding random words, phrases, or character sequences to the email, in order to
> change the contents enough to fail the comparison. Since these words would
> intefere with the human reader's ability to comprehend the email, spammers try
> to hide them from view by imbedding them as html comments, or as invalid html
> tags, or as invisible text within the body of the email.
>
>
> It is possible. See 'perldoc Mail::SpamAssassin::Conf' for details on the
> configuration file options, and make your own tests up as a seperate file in
> /usr/share/spamassassin. You also want to read the spamassassin(1) manpage; it
> gives some hints about naming and placement of your local grading file within
> the spamassassin file hierarchy.

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> i will disturb you one more time with questions about Spamassassin
> there is one test about the .biz domain (BIZ_TLD) .
> what is wrong when there is link to a site from that domain
> any ideas ?

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