Mail delivery failed: returning message to sender

Von: WEB.DE Mailer Daemon <keineantwortadresse@web.de>
Gesendet: 24.10.2023 11:25
An: <******************@web.de>
Betreff: Mail delivery failed: returning message to sender
Anlagen: details.txt, Unbenannte Anlage 00723.dat

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of
its recipients. This is a permanent error.

The following address failed:

ka@mx04.et.lindenberg.one:
multiple delivery attempts failed

--- The header of the original message is following. ---

Received: from [192.168.177.5] ([134.3.35.89]) by smtp.web.de (mrweb105
[213.165.67.124]) with ESMTPSA (Nemesis) id 1N4vNe-1rd1Hv10rM-010irl for
<ka@mx04.et.lindenberg.one>; Fri, 20 Oct 2023 09:56:39 +0200
Message-ID: <94d234cd-3dac-4854-a4c9-d212acc4c0f8@web.de>
Date: Fri, 20 Oct 2023 09:56:38 +0200
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
To: ka@mx04.et.lindenberg.one
From: Joachim Lindenberg <******************@web.de>
Subject: test
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Provags-ID: V03:K1:W3y0t+IEaNy6O435Ti//I7+do2+QNIXKTiofPuXUpo+V/L2AnX3
GVCKlIEOwMdQ6jZk1oHzediLeB5mlX39uPyfX1RuCbvBgiSy6/h2bMq+Vv1JbDe1uKY0ygS
0WwR13CBJFbs4JZxcDSBsiHfUjAs5IGaw5dTbpmx+U2NYVarroa6i3E3r8EQOxuTP6/H6W+
iRrriJA1mgMEsaxyxbzrA==