Email security question

Hello
I have a question. I keep receiving undeliverable emails from "postmaster" from various domains. These will be multiple emails that I did not send.
I have a registered domain with myhosting.com. I do not use this account for the smtp though. I this account setup on more than one pc. I have scanned for viruses,spyware and adware on all the pcs and all appears clear.
Is there a way that I can tell where these are coming from? I assume that I have a virus or trojan that is sending or relaying this? Could this be an issue from the myhosting servers?
Any help is greatly appreciated!

Here is a header from one of them:

Return-Path: <>
Delivered-To: "myemailaddress "
Received: (qmail 23907 invoked from network); 21 May 2005 02:27:37 -0000
Received: from abyss.qvc.com ([207.140.171.20])
(envelope-sender <>)
by xmail02.myhosting.com (qmail-ldap-1.03) with SMTP
for < "myemailaddress ">; 21 May 2005 02:27:30 -0000
From: Postmaster@qvc.com
To: "myemailaddress "
Date: Sat, 21 May 2005 01:08:45 UTC
Subject: DELIVERY FAILURE: User 0I9J00CIUN5L83 (0I9J00CIUN5L83@qvcmail.com) not
listed in public Name & Address Book
Importance: Normal
X-Priority: 3 (Normal)
X-MSMail-Priority: Normal
MIME-Version: 1.0
Message-ID: <a1f3.ae1d6a383aad@henmxpu.com>
X-PMX-Version: 4.7.1.128075, Antispam-Engine: 2.0.3.2, Antispam-Data: 2005.5.20.36
X-PMX-PCNT: 99%
X-MIMETrack: Itemize by SMTP Server on ABYSS/QVC(Release 5.0.11 |July 24, 2002) at 05/20/2005
10:26:15 PM,
Serialize by Router on ABYSS/QVC(Release 5.0.11 |July 24, 2002) at 05/20/2005
10:27:30 PM,
Serialize complete at 05/20/2005 10:27:30 PM
Content-Type: multipart/report; report-type=delivery-status; boundary= "==IFJRGLKFGIR57933UHRUHIHD "
X-Spam-DCC: MessageCare: xmail02 1108; Body=1 Fuz1=1 Fuz2=16
X-Spam-Checker-Version: SpamAssassin 3.0.2 (2004-11-16) on
xmail02.myhosting.com
X-Spam-Level: ****
X-Spam-Status: No, score=4.9 hits=4.9 required=5.0 tests=BAYES_00,
INVALID_DATE,MISSING_MIMEOLE,NO_REAL_NAME,PRIORITY_NO_NAME,
URIBL_AB_SURBL,URIBL_SC_SURBL,URIBL_WS_SURBL autolearn=no
version=3.0.2
X-Spam-Pyzor:

 

Hi jawdoc

Try running a on-line scan from here....
RAV

It may or may not be your PC that is infected.

Geri

 

You could have a friend that is infected. This friend would have you in their address book. The virus is getting addresses from the address book to use as the destination and the sender. A common trick to throw people off the trail.