Spam from "baosteel"

[imNet Administrator <admin+nanog () msk4 com>]

Is anyone else getting spam similar to this:
I started getting this (albeit in English) a month or two ago, and it
went away about the same time I turned on the CBL/XBL filters on
postfix.  It appears it's back again.
Note, I have absolutely zero connection with "baosteel.com" before these
started showing up.

Example:
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> From - Fri Mar 04 10:17:59 2011
> X-Account-Key: account3
> X-UIDL: 0000144b4b5bb8b1
> X-Mozilla-Status: 0001
> X-Mozilla-Status2: 00000000
> X-Mozilla-Keys:                                                                                 
> Return-Path: <yanxd () baosteel com>
> X-Original-To: immute##THISWASADDED##@msk4.com
> Delivered-To: immute##THISWASADDED##@msk4.com
> Received: from smtps-2.sercomtel.com.br (smtps-2.sercomtel.com.br [200.155.34.156])
>       by li01.msk4.com (Postfix) with ESMTP id E4ED34157
>       for <immute##THISWASADDED##@msk4.com>; Fri,  4 Mar 2011 01:20:13 -0600 (CST)
> Received: from User (unknown [95.59.199.4])
>       by smtps-2.sercomtel.com.br (Postfix) with ESMTP id 6E1D32F00C2;
>       Fri,  4 Mar 2011 04:17:55 -0300 (BRT)
> Reply-To: <mail.a3 () gmx us>
> From: "Mail Administrator"<yanxd () baosteel com>
> Subject: Email Quota Exceeded
> Date: Fri, 4 Mar 2011 08:19:40 +0100
> MIME-Version: 1.0
> Content-Type: text/plain;
>       charset="Windows-1251"
> Content-Transfer-Encoding: 7bit
> X-Priority: 3
> X-MSMail-Priority: Normal
> X-Mailer: Microsoft Outlook Express 6.00.2800.1081
> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1081
> Message-Id: <20110304071756.6E1D32F00C2 () smtps-2 sercomtel com br>
> To: undisclosed-recipients:;
>
> This is to inform you that you have exceeded your E-mail Quota Limit and
> you need to increase your E-mail Quota Limit because in less than 96 hours
> your E- mail Account will be disabled.Increase your E-mail Quota Limit and
> continue to use your Webmail Account.
>
> To increase your E-mail Quota Limit to 2.7GB, Fill in your Details as
> below and send to the E-mail Quota Webmaster by CLICKING REPLY:
>
> EMAIL ADDRESS:
> USERNAME:
> PASSWORD:
> CONFIRM PASSWORD:
> DATE OF BIRTH:
>
> Thank you for your understanding and corperation in helping us give you
> the Best of E-mail Service.
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