Hallo, ich bekomme regelmäßig Mails von Mitarbeitenden des Unternehmens Leben-begegnen
(Www.leben-begegnen.de). Die Mailsender haben das Format x.name@leben-begegnen.de
An andere Mail-Anbieter (z.B Posteingang.de) gehen die Mails problemlos durch.
Aber selbst Mails, die ich dorthin geschickt bekomme und die ich an meine Yahoo-Adresse weitergeleitet habe, gehen nicht durch. Folgende Nachricht bekomme ich vom Postmaster von Posteo:
This is the mail system at host mout01.posteo.de.

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

<dieter_hein2000@yahoo.de>: host mx-eu.mail.am0.yahoodns.net[188.125.72.73]
said: 554 Message not allowed - [PH01] Email not accepted for policy
reasons. Please visit https://senders.yahooinc.com/error-codes (in reply
to end of DATA command)
Reporting-MTA: dns; mout01.posteo.de
X-Postfix-Queue-ID: 6FD781A018E
X-Postfix-Sender: rfc822; dieter.hein@posteo.de
Arrival-Date: Wed, 20 Aug 2025 15:29:13 +0200 (CEST)

Final-Recipient: rfc822; dieterhein2000@yahoo.de
Original-Recipient: rfc822;dieterhein2000@yahoo.de
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx-eu.mail.am0.yahoodns.net
Diagnostic-Code: smtp; 554 Message not allowed - [PH01] Email not accepted for
policy reasons. Please visit https://senders.yahooinc.com/error-codes
Return-Path: dieter.hein@posteo.de
Received: from mout01.posteo.de (unknown [10.0.0.65])
by mout01.posteo.de (Postfix) with ESMTPS id 6FD781A018E
for <dieter_hein2000@yahoo.de>; Wed, 20 Aug 2025 15:29:13 +0200 (CEST)
Received: from submission-encrypt01.posteo.de (unknown [10.0.0.76])
by mout01.posteo.de (Postfix) with ESMTPS id 6207A240027
for <dieter_hein2000@yahoo.de>; Wed, 20 Aug 2025 15:29:13 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=posteo.de; s=2017;
t=1755696553; bh=mI/o3RIJO3Y4Q9ku3LhCAvEUMwfkBxLJ9hX3hzIShGc=;
h=MIME-Version:Date:From:To:Subject:Message-ID:Content-Type:
Content-Transfer-Encoding:From;
b=SSo0jbEKAUf2l9FOTPJgTOOPHG9myJbaJI9Z8hwi1zpK/SKR210ov+HRp7mcHcyHe
NMfsU8Gpfq3w3S0OgqaqwaT5JJOXfyMIuip2ja9ytfeVTePUFsFhOdIH4Uj++Lq6v7
EFnzJBXTAi/FX8WToCqdlfn/K23eV9klG4VUzXhFBWcmG7lDWekKRgi5buVPR8us4r
uUFz1bluyi3jl5cWpgK8bZriy5HaPg0/2c1pALiaZvM5FkvLZ80LdkispD4OtcUfCS
e+y57nfgCGEpWodbaj+Tdv1wlkSU6CcrlnyRgu83csfeddv+nGYr72fkS7tdlVD1xB
BFyLUvwLSQ+Gg==
Received: from customer (localhost [127.0.0.1])
by submission (posteo.de) with ESMTPSA id 4c6S3F0pvGz9rxQ
for <dieter_hein2000@yahoo.de>; Wed, 20 Aug 2025 15:29:13 +0200 (CEST)
MIME-Version: 1.0
Date: Wed, 20 Aug 2025 13:29:13 +0000
From: dieter.hein@posteo.de
To: Dieterhein2000 <dieterhein2000@yahoo.de>
Subject: Fwd: WG: Testmail ohne Signatur
Message-ID: f179e34a9a54b1d966a1740168bb80a6@posteo.de
Content-Type: text/plain; charset=UTF-8;
format=flowed
Content-Transfer-Encoding: quoted-printable
Posteo-User: dieter.hein@posteo.de
Posteo-DKIM: ok