Why is this Mail FROM SpamCop to SpamCop being blacklisted by SORBS?

Fred the Red Shirt <[email protected]>
Newsgroups gmane.mail.spam.spamcop.email
Organization Lumber Cartel
Message-ID <[email protected]>
Headers appended below.

According to the headers this auto-response from SpamCop originated
on a Level3 IP [4.159.77.67] that is blacklisted as a trojaned server.

How does this happen?  Why doesn't the SpamCop whitelisting
of SpamCop.net take precedence over it?

As they say on the net, thanks in advance.

--

FF


Return-Path: <[email protected]>
Delivered-To: [email protected]
Received: (qmail 1178 invoked from network); 31 Dec 2004 19:50:39 -0000
Received: from unknown (192.168.1.101)
  by blade5.cesmail.net with QMQP; 31 Dec 2004 19:50:39 -0000
Received: from vmx2.spamcop.net (64.74.133.250)
  by mailgate.cesmail.net with SMTP; 31 Dec 2004 19:50:39 -0000
Received: from sc-app2.eq.ironport.com (HELO spamcop.net)
(192.168.19.202)
  by vmx2.spamcop.net with SMTP; 31 Dec 2004 11:50:37 -0800
Received: from [4.159.77.67] by spamcop.net
 with HTTP; Fri, 31 Dec 2004 19:50:37 GMT
From: "Fred" <[email protected]>
To: [email protected]
Subject: [SpamCop (61.91.75.68) id:1327382223]Want a home?
Precedence: list
Message-ID: <[email protected]>
Date: Fri, 31 Dec 2004 11:33:49 -0500
X-SpamCop-sourceip: 61.91.75.68
X-Mailer: Mozilla/4.0 (compatible; MSIE 5.0; Windows 98; DigExt; JUNO)
 via http://www.spamcop.net/ v1.394
X-Spam-Checker-Version: SpamAssassin 3.0.0 (2004-09-13) on blade5
X-Spam-Level:
X-Spam-Status: hits=-92.1 tests=FORGED_MUA_MOZILLA,FORGED_RCVD_HELO,
 FROM_ENDS_IN_NUMS,J_CHICKENPOX_21,J_CHICKENPOX_46,J_CHICKENPOX_52,
 URIBL_OB_SURBL,URIBL_SBL,URIBL_WS_SURBL,USER_IN_WHITELIST
 version=3.0.0
X-SpamCop-Checked: 192.168.1.101 64.74.133.250 192.168.19.202
4.159.77.67
X-SpamCop-Disposition: Blocked dnsbl.sorbs.net
X-SpamCop-Whitelisted: spamcop.net
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