Explanation of Score

[Ronnie Regev]

Hi,
i would like to know if someone could explain how a message which is
obviously SPAM, receives the following scores:

Subject: M0rtgage Payment Due Now
MIME-Version: 1.0
Content-Type: multipart/alternative;
 boundary="--803995859687039"
X-MailScanner: Found to be clean, Found to be clean
X-MailScanner-SpamCheck: not spam, SpamAssassin (score=-5.6, required 4.5,
 BAYES_10, HTML_FONT_COLOR_GRAY, MIME_HTML_ONLY), not spam,
SpamAssassin (score=-5.6, required 4.5,
 BAYES_10, HTML_FONT_COLOR_GRAY, MIME_HTML_ONLY)

As well, are the tests listed on SpamAssassin.org automatically referenced
by SpamAssassin,or do i have to manually add tests, if so, where would i
manually add tests.

thanks.

Ronnie
Sys Admin
Daslweb.com