[SA-exim] spamassassin.conf in sa-exim-3.0

[Thomas Kinghorn]

Morning all.
Please could someone assist me with regards to this expression in the
spamassassin.conf file provided with sa-exim.
SAEximRunCond: ${if and {{def:sender_host_address} {!eq
{$sender_host_address}{127.0.0.1}} {!eq {$h_X-SA-Do-Not-Run:}{Yes}} }
{1}{0}} SAEximRunCond: 0 

If I set the RunCond to 0, all spam comes through.
I get the "Run condition expanded to false" statement.

<snip>
Received: from 173.red-80-37-208.pooles.rima-tde.net
(173.Red-80-37-208.pooles.rima-tde.net [80.37.208.173])
	by eagle.tml.co.za (8.10.0/8.11.0) with SMTP id h4L9YbQ15634
	for <dns-admin at citec.net>; Wed, 21 May 2003 11:34:39 +0200 (GMT)
Received: from  ([190.232.220.43]) by 173.red-80-37-208.pooles.rima-tde.net
id 1ykY92Q12sWn; Wed, 21 May 2003 13:30:09 +0300
Message-ID: <7n8b58v9jmd9zt27i527-2q-$g at e3k9u>
From: "Lizzie Major" <a6vjod2k at yahoo.com>
To: dns-admin at citec.net
Subject: M.I.L.F'S
Date: Wed, 21 May 03 13:30:09 GMT
X-Mailer: Internet Mail Service (5.5.2650.21)
MIME-Version: 1.0
Content-Type: multipart/alternative;
	boundary="50.3C12636__7.F78C168"
X-Priority: 3
X-MSMail-Priority: Normal
X-SA-Exim-Mail-From: a6vjod2k at yahoo.com
X-SA-Exim-Scanned: No; SAEximRunCond expanded to false
<snip>

any idea's?

Regards, 
Tom Kinghorn