EIRCA Premium Quality H-Sphere Reseller Hosting and shared Windows and Linux hosting

Someone or something apparently sent an email message that spoofed my EIRCA Reseller hosting account as the sender. I only know about it because the message bounced back to me (quoted in full, below).
The "plan" mentioned in the message -- AxisMain -- is one I use only for MY OWN domains, and there's no billing associated with it. Does this message mean that someone is trying to create a parasite website using my Free plan?

Should I be alarmed by this...
   -Ernie
=========================================
----- Original Message -----
From: <MAILER-DAEMON@mail-g3.xinnetdns.com>
To: <ernietamminga@yahoo.com>
Sent: Tuesday, July 01, 2008 10:15 PM
Subject: failure notice


> Hi. This is the qmail-send program at mail-g3.xinnetdns.com.
> I'm afraid I wasn't able to deliver your message to the following addresses.
> This is a permanent error; I've given up. Sorry it didn't work out.
>
> <ceshi@ceshi.com>:
> maildir is ceshi@ceshi.com
> domain is over quota
>
> --- Below this line is a copy of the message.
>
> Return-Path: <ernietamminga@yahoo.com>
> Received: (qmail 912 invoked by uid 88); 2 Jul 2008 05:15:38 -0000
> Received: from unknown (HELO mail.server01.*anonymoushsphereserver*.net) (202.10.76.3)
>  by 0 with SMTP; 2 Jul 2008 05:15:38 -0000
> Received: (qmail 22069 invoked by uid 399); 2 Jul 2008 00:15:34 -0500
> Received: from 75.126.201.117-static.reverse.softlayer.com (HELO cp.server01.*anonymoushsphereserver*.net) (75.126.201.117)
>  by 75.126.201.117-static.reverse.softlayer.com with ESMTPM; 2 Jul 2008 00:15:34 -0500
> X-Originating-IP: 75.126.201.117
> Message-ID: <10223970.1214975734872.JavaMail.cpanel@cp.server01.*anonymoushsphereserver*.net>
> Date: Wed, 2 Jul 2008 00:15:30 -0500 (CDT)
> From: ernietamminga@yahoo.com
> To: ceshi@ceshi.com
> Subject: New Account: AxisMain
> Mime-Version: 1.0
> Content-Type: text/plain; charset=UTF-8
> Content-Transfer-Encoding: 7bit
> X-Mailer:
> Content-Language: UTF-8
>
> Dear ceshi ceshi,
>
> Thank you for signing up with Axis Terrae Communications. We will be able to complete your account set-up as soon as we have received your payment.
>
> You have chosen the following plan: AxisMain
>
>
>                                 BILLING STATEMENT
>
>
> TOTAL:     $0.00
>
>
> To replenish your balance, follow this link:
>
> We will notify you as soon as your payment has been received and processed. At that point, you will be able to access your control panel.
>
> If you have any problems or questions, contact our tech support at:
>
>

Thank you!

I have turned off Signup Access for that plan. I notice that in the Signup Access column, it still says (FULL) next to the padlock icon. Do I need to go into that area and make everything inaccessible, too... or does just turning off Signup Access prevent people from trying to sign up for the plan?

(I'm still migrating to  :)this H-Sphere world from the CPanel/WHM world, and still poking my way around...)

   Ernie