Unable to report spam

[gw1500se]

I've been getting a lot of spam that I am unable to report. Here is one such spam

From - Tue Oct 04 04:00:35 2011
X-Account-Key: account5
X-UIDL: GmailId132cc0100dd1723e
X-Mozilla-Status: 0001
X-Mozilla-Status2: 00000000
X-Mozilla-Keys:																				 
Delivered-To: x
Received: by 10.142.225.6 with SMTP id x6cs49188wfg;
		Mon, 3 Oct 2011 15:56:50 -0700 (PDT)
Received: by 10.68.19.225 with SMTP id i1mr4689257pbe.63.1317682610332;
		Mon, 03 Oct 2011 15:56:50 -0700 (PDT)
Return-Path: <bounce[at]filefactory.com>
Received: from us-mgr.filefactory.com (mail.filefactory.com. [98.143.146.34])
		by mx.google.com with ESMTPS id n8si16503373pbg.272.2011.10.03.15.56.50
		(version=TLSv1/SSLv3 cipher=OTHER);
		Mon, 03 Oct 2011 15:56:50 -0700 (PDT)
Received-SPF: pass (google.com: domain of bounce[at]filefactory.com designates 98.143.146.34 as permitted sender) client-ip=98.143.146.34;
Authentication-Results: mx.google.com; spf=pass (google.com: domain of bounce[at]filefactory.com designates 98.143.146.34 as permitted sender) smtp.mail=bounce[at]filefactory.com
Received: from us-mgr.filefactory.com (localhost.localdomain [127.0.0.1])
	by us-mgr.filefactory.com (8.13.8/8.13.8) with ESMTP id p93MunDv030379
	for <x>; Mon, 3 Oct 2011 15:56:49 -0700
Authentication-Results: us-mgr.filefactory.com; dkim=none (no signature)
	header.i=unknown; x-dkim-adsp=fail
Received: (from root[at]localhost)
	by us-mgr.filefactory.com (8.13.8/8.13.8/Submit) id p93MunAB030378;
	Mon, 3 Oct 2011 15:56:49 -0700
To: x
Subject: No credit card? Now you can buy FileFactory Premium with your mobile
Message-ID: <559d________________________5543[at]marketing.doubleclickindustries.com>
Date: Sun, 18 Sep 2011 19:22:57 -0700
From: "FileFactory.com" <information[at]filefactory.com>
Reply-To: information[at]filefactory.com
MIME-Version: 1.0
X-Mailer-LID: 9,5,2,4,12,3
List-Unsubscribe: <http://marketing.doubleclickindustries.com/emailmarketer/unsubscribe.php?M=3157590&C=666fc134de2f52617456e903ea38a104&L=5&N=132>
X-Mailer-RecptId: 3157590
X-Mailer-SID: 132
X-Mailer-Sent-By: 1
Content-Type: multipart/alternative; charset="UTF-8"; boundary="b1_3bf0803a5e1fdf6525f41b43769e5fd7"
Content-Transfer-Encoding: 8bit

View entire message
Parsing header:
0: Received: from us-mgr.filefactory.com (mail.filefactory.com. [98.143.146.34]) by mx.google.com with ESMTPS id n8si16503373pbg.272.2011.10.03.15.56.50 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 03 Oct 2011 15:56:50 -0700 (PDT)
Hostname verified: mail.filefactory.com
Possible forgery. Supposed receiving system not associated with any of your mailhosts
Will not trust anything beyond this header

Am I doing something wrong (these are the raw headers provided to spam cop) or are spammers figuring out ways to prevent reporting? What can I do about this type of spam? TIA.

[SpamCopAdmin]

>- Supposed receiving system not associated with any of your mailhosts

That's the critical part of the error statement.

It looks like you have registered your email providers with our Mailhosts system, but forgot to include Google.

- Don D'Minion - SpamCop Admin -

- service[at]admin.spamcop.net -

.

[gw1500se]

>- Supposed receiving system not associated with any of your mailhosts

That's the critical part of the error statement.

It looks like you have registered your email providers with our Mailhosts system, but forgot to include Google.

- Don D'Minion - SpamCop Admin -

- service[at]admin.spamcop.net -

.

I don't have all my Google email accounts registered but the one that got this spam is registered. I'll try doing all of them and see what happens. Thanks.

[SpamCopAdmin]

I added the Google host to your account. You should be good to go.

- Don D'Minion - SpamCop Admin -

- service[at]admin.spamcop.net -