Mystery Spam Piling Up in Mqueue

[Jason C. Wells]

I have a bunch of mail piling up in /var/spool/mqueue.  It appears to be 
all spam and it appears to be generated on the localhost.  I am not 
sending it.  I double checked my self @ abuse.net to see if I was an 
open relay, I'm not.  I can't really say where it's coming from.  How do 
I figure this one out?

An example is shown below.

What has been a fun hobby all these years is turning into a nightmare.  
Spam is making me batty.

Thanks,
Jason C. Wells


V8
T1168684668
K1168832991
N87
P7790448
I0/81/22039
MDeferred: Connection refused by macbilling.com.
Frs
$_localhost
$r
$slocalhost
${daemon_flags}
${if_addr}192.168.1.204
SMAILER-DAEMON
MDeferred: Connection refused by macbilling.com.
rRFC822; zpiracing.net at macbilling.com
RPF:<zpiracing.net at macbilling.com>
H?P?Return-Path: <<81>g>
H??Received: from localhost (localhost)
        by mx1.highperformance.net (8.13.8/8.13.8) id l0DAbm7q007014;
        Sat, 13 Jan 2007 02:37:48 -0800 (PST)
        (envelope-from MAILER-DAEMON)
H?D?Date: Sat, 13 Jan 2007 02:37:48 -0800 (PST)
H??Received: from localhost (localhost)
        by mx1.highperformance.net (8.13.8/8.13.8) id l0DAbm7q007014;
        Sat, 13 Jan 2007 02:37:48 -0800 (PST)
        (envelope-from MAILER-DAEMON)
H?D?Date: Sat, 13 Jan 2007 02:37:48 -0800 (PST)
H?F?From: Mail Delivery Subsystem <MAILER-DAEMON>
H?x?Full-Name: Mail Delivery Subsystem
H?M?Message-Id: <200701131037.l0DAbm7q007014 at mx1.highperformance.net>
H??To: <zpiracing.net at macbilling.com>
H??MIME-Version: 1.0
H??Content-Type: multipart/report; report-type=delivery-status;
        boundary="l0DAbm7q007014.1168684668/mx1.highperformance.net"
H??Subject: Returned mail: see transcript for details
H??Auto-Submitted: auto-generated (failure)
.