I have similar problem, arround 100 spam messages in each account, and all incoming from network.
Return-Path: <artefactsx7@metronetrail.com>
Delivered-To:
21-abuso@mydomain.com Received: (qmail 28497 invoked from network); 28 Apr 2009 19:41:30 +0200
Received: from icm7-orange.orange.sk (213.151.217.135)
by dnstracker.dedicatedplace.com with SMTP; 28 Apr 2009 19:41:30 +0200
Received: from 213.151.217.135 by cluster8a.eu.messagelabs.com; Tue, 28 Apr 2009 19:39:44 +0100
Message-ID: <000d01c9c828$51458f50$6400a8c0@artefactsx7>
From: "Jimmy Manning" <artefactsx7@metronetrail.com>
To: <abuso@mydomain.com>
Subject: A Permission Marketing Primer: Picking and Choosing
Date: Tue, 28 Apr 2009 19:39:44 +0100
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_NextPart_000_0075_01C9C828.51458F50"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Windows Mail 6.0.6001.18000
X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049
X-Spam-Checker-Version: SpamAssassin 3.0.5 (2005-11-28) on mydomain.com
X-Spam-Level:
X-Spam-Status: No, score=0.1 required=3.0 tests=BAYES_00,HTML_40_50,
HTML_MESSAGE,MSGID_DOLLARS autolearn=no version=3.0.5
X-Antivirus: AVG for E-mail 8.5.322 [270.12.7/2085]
I have installed dcc, razor-agents, pyzor and qgreylist. CentOs4 + Plesk 8.0.1.