Eigene eMails werden als Spam klassizifiert

In letzter Zeit bekomme ich relativ oft bei ausgehenden eMails, folgende Antwort:

Von: MAILER-DAEMON@mx2.mailbox.org (Mail Delivery System)

1. Betreff: Undelivered Mail Returned to Sender

   
   

   Datum: 21. Oktober 2016 um 10:01:59 MESZ

   
   

   An: ABSENDER(ICH)@MEINEDOMAIN.ME

   
   

   This is the mail system at host mx2.mailbox.org.

   
   

   I'm sorry to have to inform you that your message could not

   
   

   be delivered to one or more recipients. It's attached below.

   
   

   For further assistance, please send mail to postmaster.

   
   

   If you do so, please include this problem report. You can

   
   

   delete your own text from the attached returned message.

   
   

   The mail system

   
   

   <EMPFÄNGER@MEINEDOMAIN.ME>: host smx4.web-hosting.com[xx.54.122.252] said: 550 The

   
   

   content of this message looked like spam. (in reply to end of DATA command)

   
   

   Reporting-MTA: dns; mx2.mailbox.org

   
   

   X-Postfix-Queue-ID: xx86445BE1

   
   

   X-Postfix-Sender: rfc822; ABSENDER(ICH)@MEINEDOMAIN.ME

   
   

   Arrival-Date: Fri, 21 Oct 2016 10:01:45 +0200 (CEST)

   
   

   Final-Recipient: rfc822; EMPFÄNGER@MEINEDOMAIN.ME

   
   

   Original-Recipient: rfc822;EMPFÄNGER@MEINEDOMAIN.ME

   
   

   Action: failed

   
   

   Status: 5.0.0

   
   

   Remote-MTA: dns; smx4.web-hosting.com

   
   

   Diagnostic-Code: smtp; 550 The content of this message looked like spam.

   
   

   Return-Path: <ABSENDER(ICH)@MEINEDOMAIN.ME>

   
   

   Received: from smtp1.mailbox.org (smtp1.mailbox.org [xx.241.60.240])

   
   

   (using TLSv1.2 with cipher xxxHE-RSA-AES256-GCM-SHA384 (256/256 bits))

   
   

   (No client certificate requested)

   
   

   by mx2.mailbox.org (Postfix) with ESMTPS id 8686445BE1

   
   

   for <EMPFÄNGER@MEINEDOMAIN.ME>; Fri, 21 Oct 2016 10:01:45 +0200 (CEST)

   
   

   X-Virus-Scanned: amavisd-new at heinlein-support.de

   
   

   Received: from smtp1.mailbox.org ([xx.241.60.240])

   
   

   by gerste.heinlein-support.de (gerste.heinlein-support.de [xx.198.250.173]) (amavisd-new, port 10030)

   
   

   with ESMTP id xx-5NMpH3b1k for <EMPFÄNGER@MEINEDOMAIN.ME>;

   
   

   Fri, 21 Oct 2016 10:01:30 +0200 (CEST)

   
   

   From: ABSENDER(ICH) Weishaupt <ABSENDER(ICH)@MEINEDOMAIN.ME>

   
   

   Content-Type: multipart/mixed;

   
   

   boundary="Apple-Mail=_xxxFC528-3B48-4CD6-90BE-C97FD47F4E20"

   
   

   Mime-Version: 1.0 (Mac OS X Mail 10.0 \(3226\))

   
   

   Subject: BETREFF

   
   

   Message-Id: <xxxC92A0-B2B2-431C-8D45-53A24EEDEE7D@MEINEDOMAIN.ME>

   
   

   References: <xxxA3D9-D0BD-4E9B-9A29-839F979E01D8@MEINEDOMAIN.ME>

   
   

   To: Mum <EMPFÄNGER@MEINEDOMAIN.ME>

   
   

   Date: Fri, 21 Oct 2016 10:01:17 +0200