SPamc not filtering all mail.

[Jai Rangi <jp...@aleks.com>]

Hello,
I have this rule in my .procmailrc,

:0f
* ^[F|f]rom:.*ourdomain\.com
* 
^[m|M]essage-[i|I][D|d]:.*ourdomain\.com|^Received:.*(authenticated).*\.ourdomain\.com
| formail -A"X-Spam: none"

:0fw
* < 256000
* !^X-Spam: none
* !^FROM_DAEMON
| /usr/bin/spamc

We don't want SPAMASSASSIN to check any mails coming from our own 
domain. So every email must be tagged for
either X-Spam: none OR

X-Spam-Level: 
X-Spam-Status: No,....

This seems to have been pretty good, but every once in a while we get 
few emails that dont get checked for spam. and neither get the tag 
X-SPAM: none.
For Example this one,

Return-Path: <sm...@hobarotua.com> <ma...@hobarotua.com>
X-Original-To: user@ourdomain.com
Delivered-To: user@ourdomain.com
Received: from node.ourdomain.com (node.ourdomain.com [OUR.PUBLIC.IP.ADDr])
by localmail.lan.aleks.com (Postfix) with ESMTP id 2CB3D60E26
for user@ourdomain.com; Fri, 9 Feb 2007 04:05:19 -0800 (PST)
Received: from sys1.hobarotua.com (66.63.190.191.oc3networks.com 
[66.63.190.191] (may be forged))
by node.ourdomain.aleks.com (8.11.6/8.11.6) with ESMTP id l19C5Ji11370
for < user@ourdomain.com > <ma...@aleks.com>; Fri, 9 Feb 2007 
04:05:19 -0800
Message-Id: <20...@node.ourdomain.com> 
<mailto:%3c200702091205.l19C5Ji11370@node.ourdomain.com%3e> //This 
message ID was forged to like like from our domain.
Received: by sys1.hobarotua.com id hphhnu0cq2g5 for < user@ourdomain.com 
 > <ma...@aleks.com>; Fri, 9 Feb 2007 04:05:17 -0800 
(envelope-from <sm...@hobarotua.com> <ma...@hobarotua.com>)
from: "Message in a Bottle"<sm...@hobarotua.com> <ma...@hobarotua.com>
to: " user@ourdomain.com”
subject: Personalized Message in a Bottle
date: 2/9/2007 4:05:28 AM
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary="----Multipart-Boundary-xxcekeBKXHe7w---"

This is a multi-part message in MIME format.


Can anyone help me out what I might be doing wrong, how can I make sure 
that every email not from our domain must be checked for spam.
I am using postfix+spamassassin. version spamassassin-3.0.6-1.fc4


Thank you,
-Jai