Vodafone SMTP server used to relay virus?

Hey Vodafone guys. Just saw a message in my spam folder which looked pretty legit. It was about getting a PXT and it being attached. It looked pretty legit apart from the fact I haven't been on Vodafone for 1.5 years + and the attachment was a .txt file. Anyway took a look at the header. Looks like Vodafone SMTP servers are relaying these messages through. Some kind of oversight by the mail server admins perhaps?Return-Path: <+6421938397@pxt.vodafone.net.nz>

Received: from ismx03ftc.vodafone.co.nz (202-73-207-62.vodafone.net.nz [202.73.206.62]) by Gemini.web-2u.co.nz with SMTP;

Sun, 3 Mar 2013 20:57:13 +1300

Received: (qmail 670 invoked from network); 3 Mar 2013 07:30:48 -0000

Received: from unknown (HELO MAIL?RELAY) (172.27.177.71)

by ismx03ftc.vodafone.co.nz with SMTP; 3 Mar 2013 07:30:44 -0000

date: Sun, 03 Mar 2013 07:30:42 +0000

From: PXT <6421938397@pxt.vodafone.net.nz>

message-id: <B9JD3L3MZD34HRA0HR7@xma.724.com>

Sender: 6421938397@pxt.vodafone.net.nz

To: XX

Subject: You have a PXT from 6421938397

Mime-Version: 1.0

Content-Type: multipart/mixed;

boundary="AE1F4D6CE0FFA8B7"

X-Spam-Checker-Version: SpamAssassin 3.0.0 (2004-09-13) on

ismx03ftc.vodafone.co.nz

X-Spam-Level:

X-Spam-Status: No, score=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_40,

HTML_MESSAGE,HTML_TAG_EXIST_TBODY,SUBJ_HAS_UNIQ_ID autolearn=failed

version=3.0.0

X-SmarterMail-Spam: SPF_None, ISpamAssassin 8 [raw: 5], DK_None, DKIM_None

X-SmarterMail-TotalSpamWeight: 8