Ich habe soeben eine Mail von Posteo bekommen:
This is the mail system at host mout01.posteo.de.
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Your message could not be delivered for more than 8 hour(s).
It will be retried until it is 1 day(s) old.
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The mail system
<x@ZielDomain>: Server certificate not verified
Reporting-MTA: dns; mout01.posteo.de
X-Postfix-Queue-ID: 4D81B1A00CF
X-Postfix-Sender: rfc822; x@posteo.de
Arrival-Date: Sat, 7 May 2022 14:49:55 +0200 (CEST)
Final-Recipient: rfc822; x@ZielDomain
Original-Recipient: rfc822;x@ZielDomain
Action: delayed
Status: 4.7.5
Diagnostic-Code: X-Postfix; Server certificate not verified
Will-Retry-Until: Sun, 8 May 2022 14:49:55 +0200 (CEST)
Return-Path: x@posteo.de
Received: from mout01.posteo.de (unknown [10.0.0.65])
by mout01.posteo.de (Postfix) with ESMTPS id 4D81B1A00CF
for <x@ZielDomain>; Sat, 7 May 2022 14:49:55 +0200 (CEST)
Received: from submission-encrypt01.posteo.de (unknown [10.0.0.76])
by mout01.posteo.de (Postfix) with ESMTPS id 2A430240028
for <x@ZielDomain>; Sat, 7 May 2022 14:49:55 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017;….
Received: from customer (localhost [127.0.0.1])
by submission (posteo.de) with ESMTPSA id 4KwS2B3vfCz9rxB;
Sat, 7 May 2022 14:49:54 +0200 (CEST)
Message-ID: x@posteo.de
Date: Sat, 7 May 2022 12:49:54 +0000
MIME-Version: 1.0
Subject: x
Content-Language: de-DE
To: x <x@ZielDomain>
References: <5a-62766b00-9-111aa2e0@244600546>
From: x@posteo.de
In-Reply-To: <5a-62766b00-9-111aa2e0@244600546>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Posteo-User: x@posteo.de
Posteo-Dkim: ok
Nur welches Zertifikat ist nicht “nicht verifiziert”. Es ist ja ein Let’s Encrypt Zertifikat von Mailcow beim Installieren eingerichtet worden.
Auszug aus dem Log:
…
mail.ZielDomain - Certificate /var/lib/acme/mail.ZielDomain/cert.pem missing or changed domains ‘mail.ZielDomain autoconfig.ZielDomain autodiscover.ZielDomain mta-sts.ZielDomain’ - start obtaining
mail.ZielDomain - Certificate successfully obtained
….
