Was soll das???

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<xxxxxxx>: host msn-com.olc.protection.outlook.com[104.47.13.33]
   said: 550 5.7.1 Unfortunately, messages from [194.25.134.85] weren't sent.
   Please contact your Internet service provider since part of their network
   is on our block list (S3140). You can also refer your provider to
   http://mail.live.com/mail/troubleshooting.aspx#errors.
   [HE1EUR04FT056.eop-eur04.prod.protection.outlook.com] (in reply to MAIL
   FROM command)
Reporting-MTA: dns; mailout11.t-online.de
X-Postfix-Queue-ID: C109942125EF
X-Postfix-Sender: rfc822; hginnow@t-online.de
Arrival-Date: Wed, 28 Aug 2019 03:20:26 +0200 (CEST)

Final-Recipient: rfc822; xxxxxxxx
Original-Recipient: rfc822;paul_ayres@msn.com
Action: failed
Status: 5.7.1
Remote-MTA: dns; msn-com.olc.protection.outlook.com
Diagnostic-Code: smtp; 550 5.7.1 Unfortunately, messages from [194.25.134.85]
   weren't sent. Please contact your Internet service provider since part of
   their network is on our block list (S3140). You can also refer your
   provider to http://mail.live.com/mail/troubleshooting.aspx#errors.
   [HE1EUR04FT056.eop-eur04.prod.protection.outlook.com]
Return-Path: <hginnow@t-online.de>
Received: from fwd25.aul.t-online.de (fwd25.aul.t-online.de [172.20.26.130])
by mailout11.t-online.de (Postfix) with SMTP id C109942125EF
for <paul_ayres@msn.com>; Wed, 28 Aug 2019 03:20:26 +0200 (CEST)
Received: from [192.168.2.101] (Z2BED6ZDwhbPDswxSIbUwXvBaRlnD1fc9KvGnH2184z6BtvMbNVgRXpC1FNbVLrgk6@[87.143.55.142]) by fwd25.t-online.de
with (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384 encrypted)
esmtp id 1i2mdA-0IYFZw0; Wed, 28 Aug 2019 03:20:12 +0200
From: Hartmut Ginnow-Merkert <hginnow@t-online.de>
Content-Type: multipart/alternative;
boundary="Apple-Mail=_BC7814E6-CEDC-4D6F-AFB8-2EFE1FF3A78B"
Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\))
Subject: Fwd: Undelivered Mail Returned to Sender
Message-Id: <188D1D05-47D2-45C3-9E76-9E74D24EC741@t-online.de>
References: <20190826185152.B26BC41D0EC0@mailout08.t-online.de>
To: Paul Ayres <xxxxxx>
Date: Wed, 28 Aug 2019 03:20:11 +0200
X-Mailer: Apple Mail (2.3445.9.1)
X-ID: Z2BED6ZDwhbPDswxSIbUwXvBaRlnD1fc9KvGnH2184z6BtvMbNVgRXpC1FNbVLrgk6
X-TOI-MSGID: fb69101f-c99a-4601-b497-0e594084dd63