メール送信エラー通知

[au one net <no-reply@xxxxxxxxxxxxxxxx>]

送信先のメールアドレスが、現在利用できない状態になっています。

※本メールはau one netのメールシステムより配信しております。
このメールには直接返信いただけません。

（　以下、サーバから出力されたエラーメッセージ　）

Your mail could not be delivered due to the following error.

<drgreg@xxxxxxxxxxxxxx>: host mx.rediffmail.rediff.akadns.net[202.137.235.10]
    said: 550 Requested action not taken: mailbox unavailable (in reply to RCPT
    TO command)

Reporting-MTA: dns; msa101lp.auone-net.jp
X-au-one-net-msa-Queue-ID: 5A4FB6C0031
X-au-one-net-msa-Sender: rfc822; xfs@oss.sgi.com
Arrival-Date: Mon, 31 Mar 2008 10:50:48 +0900 (JST)

Final-Recipient: rfc822; drgreg@rediffmail.com
Original-Recipient: rfc822;drgreg@rediffmail.com
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx.rediffmail.rediff.akadns.net
Diagnostic-Code: smtp; 550 Requested action not taken: mailbox unavailable

Received: from oss.sgi.com (N092034.ppp.dion.ne.jp [61.202.92.34])
        by msa101lp.auone-net.jp (au one net msa) with ESMTP id 5A4FB6C0031
        for <drgreg@xxxxxxxxxxxxxx>; Mon, 31 Mar 2008 10:50:48 +0900 (JST)
From: xfs@xxxxxxxxxxx
To: drgreg@xxxxxxxxxxxxxx
Subject: delivery failed
Date: Mon, 31 Mar 2008 10:50:21 +0900
MIME-Version: 1.0
Content-Type: multipart/mixed;
        boundary="----=_NextPart_000_0003_B05C3903.E9DEF4BA"
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 6.00.2600.0000
X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000
Message-Id: <20080331015049.5A4FB6C0031@xxxxxxxxxxxxxxxxxxxxx>