Mail with spam and score 50 still delivered?

[Remco Barendse]

Today one of my users received two identical e-mails (with subject
Mortgage rates just got better 3.55% Fixed).

One e-mail was filtered out correctly although with a very weird message
in the spam score at the bottom of the scored rules (spam (blacklisted)).
Nothing in that e-mail would match my blacklisting rules!

Anybody else seeing this behaviour? I have my max score set to 9 and the
other e-mail got blocked (possibly only because it was marked blacklisted
altho I don't know why) but this e-mail got through.

This the header from the mail that made it through (Exchange header):

From: "" <drflojosi at spray.se>
Reply-To: "" <drflojosi at spray.se>
To: <xxx at xxx>
Subject: {Spam?} xxxxx,Mortgage rates just got better 3.55% Fixed
Date: Tue, 07 Oct 03 02:55:35 GMT
X-Mailer: Microsoft Outlook, Build 10.0.2616
MIME-Version: 1.0
Content-Type: multipart/alternative;
        boundary=".BE9.DB781B6"
X-Priority: 3
X-MSMail-Priority: Normal
X-MailScanner-Information: Please contact the ISP for more information
X-MailScanner: Found to be clean
X-MailScanner-SpamCheck: spam, SpamAssassin (score=50.249, required 6,
        BAD_CREDIT 0.16, BANG_MORE 1.17, CLICK_BELOW_CAPS 0.57,
        CONSOLIDATE_DEBT 4.30, DATE_IN_FUTURE_03_06 2.83,
        DATE_SPAMWARE_Y2K 4.40, DCC_CHECK 1.81, EXCUSE_14 0.15,
        FORGED_MUA_OUTLOOK 1.58, FORGED_OUTLOOK_HTML 1.10,
        FORGED_RCVD_NET_HELO 3.02, FRONTPAGE 1.63, HTML_90_100 1.07,
        HTML_FONTCOLOR_BLUE 0.10, HTML_FONTCOLOR_RED 0.10,
        HTML_FONTCOLOR_UNSAFE 0.10, HTML_FONT_BIG 0.10,
        HTML_LINK_CLICK_CAPS 0.50, HTML_LINK_CLICK_HERE 0.10,
        HTML_MESSAGE 0.00, HTML_TAG_BALANCE_HTML 0.41, LOW_PAYMENT 1.26,
        MAILTO_TO_SPAM_ADDR 1.05, MIME_HTML_ONLY 0.10,
        MIME_HTML_ONLY_MULTI 1.10, MISSING_MIMEOLE 1.15, MORTGAGE_PITCH
1.54,
        MORTGAGE_RATES 1.10, NO_REAL_NAME 0.28, RCVD_IN_BL_SPAMCOP_NET
2.25,
        RCVD_IN_DSBL 1.10, RCVD_IN_NJABL 0.10, RCVD_IN_NJABL_PROXY 1.10,
        RCVD_IN_OPM 4.30, RCVD_IN_OPM_HTTP 4.30, RCVD_IN_OPM_HTTP_POST
4.30)
X-MailScanner-SpamScore:
ssssssssssssssssssssssssssssssssssssssssssssssssss
Return-Path: drflojosi at spray.se
X-OriginalArrivalTime: 06 Oct 2003 21:02:51.0727 (UTC)
FILETIME=[3479BDF0:01C38C4D]