[Postfixbuch-users] eine Frage zum greylisting

[Andreas Meyer]

Hallo Alle!

Eine Kundin von mir berichtet von einer unzustellbaren Email, in der
sie eine Spam-Message angeblich von Amazon an mich weiterleiten wollte.
Die Absenderin habe ich im log tuschiert.

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:

"anmeyer at anup.de":
SMTP error from remote server after RCPT command:
host: mail.anup.de
4.2.0<anmeyer at anup.de>: Recipient address rejected: greylisted for 300 seconds


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

Received: from [192.168.182.101] ([84.176.206.174]) by mail.gmx.com (mrgmx103)
  with ESMTPSA (Nemesis) id 0MDzGN-1WP0YS1aFL-00HKIa for<anmeyer at anup.de>;
  Fri, 07 Mar 2014 22:17:03 +0100
Message-ID:<531A3766.80507 at gmx.de>
Date: Fri, 07 Mar 2014 22:17:26 +0100
From: "ersetzt"<replaced at gmx.de>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0
MIME-Version: 1.0
To: Andreas Meyer<anmeyer at anup.de>
Subject: Fwd: Amazon u? hast Du ing. =?UTF-8?B?Z2Vsw7ZzY2h0Pw==?=
References:<E1WKxt1-000873-H8 at gator3078.hostgator.com>
In-Reply-To:<E1WKxt1-000873-H8 at gator3078.hostgator.com>
X-Forwarded-Message-Id:<E1WKxt1-000873-H8 at gator3078.hostgator.com>
Content-Type: multipart/alternative;
  boundary="------------010001070205010407070200"
X-Provags-ID:  V03:K0:rgTQLqOvwpBisG7HtW319aeKLXCwupVc2aybt2is/nblkjOHToL
  bMfUGdVhrVSNasNPQmxOIiQMSXO1ZuODgJRRF/kcLZ7f8J2eauvsf+3Vhu4FbTXdg+hknLG
  BqT50qW+WQLS3can7BEVH1hQXqgm3hSTeReYAml+vcIfiBIrdvE9dD4/f6E4Zxl8x44TUgl
  j+T4XCluLToWkSraKGHjw==

Das logfile dazu:

Mar  7 22:17:03 delta anup/smtpd[26414]: connect from mout-xforward.gmx.net[82.165.159.13]
Mar  7 22:17:03 delta anup/smtpd[26414]: Anonymous TLS connection established from mout-xforward.gmx.net[82.165.159.13]: TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)
Mar  7 22:17:06 delta postgrey[840]: action=greylist, reason=new, client_name=mout-xforward.gmx.net, client_address=82.165.159.13, sender=replaced at gmx.de, recipient=anmeyer at anup.de
Mar  7 22:17:06 delta anup/smtpd[26414]: NOQUEUE: reject: RCPT from mout-xforward.gmx.net[82.165.159.13]: 450 4.2.0 <anmeyer at anup.de>: Recipient address rejected: greylisted for 300 seconds; from=<replaced at gmx.de> to=<anmeyer at anup.de> proto=ESMTP helo=<mout-xforward.gmx.net>
Mar  7 22:17:06 delta anup/smtpd[26414]: disconnect from mout-xforward.gmx.net[82.165.159.13]

Was ich daran nicht verstehe ist erstens, wieso die Kundin eine Nachricht
über das erfolgte greylisting erhalten hat und zweitens, wieso das ein
permanenter error sein soll.

Bin für jede Erhellung dankbar!

  Andreas