failure notice

[MAILER-DAEMON at rss7.ymc.ne.jp]

Hi. This is the qmail-send program at rss7.ymc.ne.jp.
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.

<aaa at hamada.shimane.med.or.jp>:
vdeliver: Invalid or unknown virtual user 'aaa'

--- Below this line is a copy of the mail header.

Return-Path: <pqkthurqkjqrw at starbug.iloaf.com>
Received: (qmail 23892 invoked from network); 15 Jun 2009 15:25:59 +0900
Received: from unknown (HELO 210.175.91.134) (79.127.8.5)
  by rss7.ymc.ne.jp with SMTP; 15 Jun 2009 15:25:59 +0900
From: "$B>>;3(B$BM$<B2@(B" <pqkthurqkjqrw at starbug.iloaf.com>
To: aaa at hamada.shimane.med.or.jp
Subject: 
Date: Mon, 15 Jun 2009 15:24:45 -0800
X-Info:aaa at hamada.shimane.med.or.jp
MIME-Version: 1.0
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List-Id: 8