WCM Forum - strages mail

ich bekomm so alle 2 tage diese nachricht:

Zitat:

The original message was received at Thu, 7 Apr 2005 18:46:57 +0200
from M1788P024.adsl.highway.telekom.at [80.121.95.120]

----- The following addresses had permanent fatal errors -----
<017785@telering.at>
(reason: 550-Mailbox unknown. Either there is no mailbox associated with this)
(expanded from: <017785@telering.at>)

----- Transcript of session follows -----
... while talking to nmail.telering.at.:

>>>>>> DATA

<<< 550-Mailbox unknown. Either there is no mailbox associated with this
<<< 550-name or you do not have authorization to see it.
<<< 550 5.1.1 User unknown
550 5.1.1 <017785@telering.at>... User unknown
<<< 503 5.5.1 No recipients

Reporting-MTA: dns; telering.at
Received-From-MTA: DNS; M1788P024.adsl.highway.telekom.at
Arrival-Date: Thu, 7 Apr 2005 18:46:57 +0200

Final-Recipient: RFC822; 017785@telering.at
Action: failed
Status: 5.1.1
Diagnostic-Code: SMTP; 550-Mailbox unknown. Either there is no mailbox associated with this
Last-Attempt-Date: Thu, 7 Apr 2005 18:47:13 +0200

Return-Path: <c.juritsch@gmx.at>
Received: from telering.at (M1788P024.adsl.highway.telekom.at [80.121.95.120])
by telering.at with ESMTP id j37GktxP002585
for <017785@telering.at>; Thu, 7 Apr 2005 18:46:57 +0200
Message-Id: <200504071646.j37GktxP002585@telering.at>
From: c.juritsch@gmx.at
To: 017785@telering.at
Subject:
Date: Thu, 7 Apr 2005 18:47:58 +0200
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_NextPart_000_0016----=_NextPart_000_0016"
X-Priority: 3
X-MSMail-Priority: Normal

was bedeutet das? ich hab nie eine mail an telering gesand...
jemand eine ahnung?