Can't get whitelist_from_rcvd in SpamAssassin configured correctly

I'm trying to whitelist all mail coming in from our mailing list server, but I can't seem to get it quite right.  I've been working with whitelist_from_rcvd in local.cf and I've tried a number of different setups.  The server is winooski.cctv.org and uses an alias of mailman.cctv.org.  The authoritative nameserver is clover.sover.net.  trusted_networks is set with the appropriate IPs.  Here's my best guess, which doesn't work:

whitelist_from_rcvd *@mailman.cctv.org cctv.org
whitelist_from_rcvd *@winooski.cctv.org cctv.org

And here's the header from a typical false positive, with email addresses scrubbed ($=@):

From - Wed Jan 23 10:35:41 2008
X-Mozilla-Status: 0001
X-Mozilla-Status2: 00000000
Received: from winooski.cctv.org ([216.114.135.107]) by colchester.cyberskillsvt.org with Microsoft SMTPSVC(6.0.3790.1830);
       Tue, 22 Jan 2008 08:01:09 -0500
Received: from localhost (localhost.localdomain [127.0.0.1])
      by winooski.cctv.org (Postfix) with ESMTP id BBCA11E56EDA;
      Tue, 22 Jan 2008 08:01:05 -0500 (EST)
X-Virus-Scanned: amavisd-new at winooski.cctv.org
X-Spam-Flag: YES
X-Spam-Score: 6.629
X-Spam-Level: ******
X-Spam-Status: Yes, score=6.629 tagged_above=-999 required=5 tests=[AWL=3.470,
      BAYES_50=0.001, DRUGS_ERECTILE=0.493, FUZZY_CREDIT=1.079,
      IMPOTENCE=0.627, NO_REAL_NAME=0.961, SPF_HELO_PASS=-0.001,
      SPF_PASS=-0.001]
Received: from winooski.cctv.org ([127.0.0.1])
      by localhost (winooski.cctv.org [127.0.0.1]) (amavisd-new, port 10024)
      with ESMTP id PCYqBHsTz04E; Tue, 22 Jan 2008 08:01:05 -0500 (EST)
Received: from winooski.cctv.org (localhost.localdomain [127.0.0.1])
      by winooski.cctv.org (Postfix) with ESMTP id CA9B31E56EB3;
      Tue, 22 Jan 2008 08:00:39 -0500 (EST)
X-Original-To: cctv-owner$mailman.cctv.org
Delivered-To: cctv-owner$mailman.cctv.org
Received: from localhost (localhost.localdomain [127.0.0.1])
      by winooski.cctv.org (Postfix) with ESMTP id 9EC9F1E56EB3
      for <cctv-owner$mailman.cctv.org>; Tue, 22 Jan 2008 08:00:38 -0500 (EST)
X-Virus-Scanned: amavisd-new at winooski.cctv.org
Received: from winooski.cctv.org ([127.0.0.1])
      by localhost (winooski.cctv.org [127.0.0.1]) (amavisd-new, port 10024)
      with ESMTP id LySg9v2rg2He for <cctv-owner$mailman.cctv.org>;
      Tue, 22 Jan 2008 08:00:32 -0500 (EST)
Received: from winooski.cctv.org (localhost.localdomain [127.0.0.1])
      by winooski.cctv.org (Postfix) with ESMTP id AACE11E56ED8
      for <cctv-owner$mailman.cctv.org>; Tue, 22 Jan 2008 08:00:02 -0500 (EST)
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Subject: ***SPAM*** 49 CCTV moderator request(s) waiting
From: cctv-bounces$mailman.cctv.org
To: cctv-owner$mailman.cctv.org
Message-ID: <mailman.0.1201006802.22856.cctv$mailman.cctv.org>
Date: Tue, 22 Jan 2008 08:00:02 -0500
Precedence: bulk
X-BeenThere: cctv$mailman.cctv.org
X-Mailman-Version: 2.1.8
List-Id: <cctv.mailman.cctv.org>
X-List-Administrivia: yes
Sender: mailman-bounces$winooski.cctv.org
Errors-To: mailman-bounces$winooski.cctv.org
Return-Path: mailman-bounces$winooski.cctv.org
X-OriginalArrivalTime: 22 Jan 2008 13:01:09.0947 (UTC) FILETIME=[DBCDD8B0:01C85CF6]

Thanks!
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