I receive the second of weird messages what seems one virus
How is directed from what seems valid list address , I copy header here.

X-Apparently-To: edgardec2001 at yahoo.com.ar via 206.190.38.91; Wed, 18 Aug
2004 11:52:35 -0700
X-YahooFilteredBulk: 212.253.56.233
X-Originating-IP: [212.253.56.233]
Return-Path: <squeak-dev at lists.squeakfoundation.org>
Received: from 212.253.56.233  (HELO magicturkey.net) (212.253.56.233)
  by mta348.mail.scd.yahoo.com with SMTP; Wed, 18 Aug 2004 11:52:35 -0700
Date: Wed, 18 Aug 2004 21:51:40 +0200
To: "Edgardec" <edgardec2001 at yahoo.com.ar>
From: "Squeak-dev" <squeak-dev at lists.squeakfoundation.org>
Subject: RE: Text message
Message-ID: <ltlycghzwjfthuroacn at yahoo.com.ar>
MIME-Version: 1.0
Content-Type: multipart/mixed;

Have an attached named Half_Life.hta, what I don't open.
Someone could comment about this ?
Any virus politic different of do not open attachments ?

Edgar