spamassassin vs. html emails

[Will Trillich <will@serensoft.com>]

i get a LOT of spam that slips thru spamassassin --

it's multipart/alternative, but the only alternative is html,
which i would hope would get a positive hit under "html-only
email" test.

the end of all the headers looks thus:

	Content-Type: multipart/alternative;
			boundary="D6BF60FCF.6"
	X-Priority: 3
	X-MSMail-Priority: Normal
	X-Spam-Status: No, hits=0.0 required=4.0 tests= version=2.20
	X-Spam-Level: 
	Status: RO
	Content-Length: 3537
	Lines: 99

	Content-Type: text/html;
	Content-Transfer-Encoding: quoted-printable

	[-- text/html is unsupported (use 'v' to view this part) --]

and everything else is html.

note ZERO hits! i've got

# grep -i html *scores*
50_scores.cf:score CTYPE_JUST_HTML                3.154
50_scores.cf:score HTML_EMBEDS                    0.265
50_scores.cf:score HTML_WITH_BGCOLOR              -0.546
50_scores.cf:score UNNEEDED_HTML_ENCODING         2.183
50_scores.cf:score EGP_HTML_BANNER                -6.0

i've looked at man spamassassin and Mail::SpamAssassin::Conf and
there's not a lot there about the individual rules and what they
do. spamassassin.org/tests.html tells what the default scores
are, but not where to go to turn on/turn off/create new tests...

so i'm wondering where to look on how to create new tests.
anybody know this?

-- 
I use Debian/GNU Linux version 3.0;
Linux boss 2.4.18-bf2.4 #1 Son Apr 14 09:53:28 CEST 2002 i586 unknown
 
DEBIAN NEWBIE TIP #42 from Pietro Cagnoni <pcagnoni@mclink.net>
and Kent <ktb@nixnotes.org>
:
Would you like to DISABLE CONTROL-ALT-DEL? Piece of cake.
Just comment the line out in /etc/inittab
	# What to do when CTRL-ALT-DEL is pressed.
	ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
and then "kill -HUP 1" to have init re-read the file.

Also see http://newbieDoc.sourceForge.net/ ...