Page 1 of 1

RDNS check not working?

Posted: 05 Apr 2017 07:04
by Alex
please look at the message header. I am a bit confused, the mailscanner received mails from servers without rdns?

Received: from (unknown [])
(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
(No client certificate requested)
by (Postfix) with ESMTPS id 96A041012FF
for <>; Tue, 4 Apr 2017 23:18:10 +0200 (CEST)

best regards

Re: RDNS check not working?

Posted: 05 Apr 2017 21:34
by shawniverson
What is in your smtpd_recipient_restrictions in /etc/postfix/ ?

Re: RDNS check not working?

Posted: 12 Apr 2017 13:09
by Alex
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, reject_non_fqdn_recipient, reject_unknown_recipient_domain, check_recipient_access hash:/etc/postfix/recipient_access, check_policy_service inet:

Mailheader :

X-Spam-Status: No
X-Alroma-MailScanner-EFA-Watermark: 1492604325.90341@nugdGKU68gXe6goRHil6zA
X-Alroma-MailScanner-EFA-SpamScore: s
X-Alroma-MailScanner-EFA-SpamVirus-Report: Sanesecurity.Malware.26839.RtfHeur.1.UNOFFICIAL
X-Alroma-MailScanner-EFA: Found to be clean
X-Alroma-MailScanner-EFA-ID: AF50A100129.A4032
X-Alroma-MailScanner-EFA-Information: Please contact for more information
Received: from [] (unknown [])
by (Postfix) with ESMTP id AF50A100129
for <>; Wed, 12 Apr 2017 14:18:41 +0200 (CEST)
Date: Wed, 12 Apr 2017 14:18:40 +0200
From: "" <>
X-Priority: 3 (Normal)
Message-ID: <>
To: <>
Subject: Scanned Image from a Xerox WorkCentre
MIME-Version: 1.0
Content-Type: multipart/mixed;
X-MS-Exchange-Organization-Network-Message-Id: 69465d75-5266-456c-a773-08d4819e2b7c
X-MS-Exchange-Organization-AVStamp-Enterprise: 1.0
X-MS-Exchange-Organization-AuthAs: Anonymous

Re: RDNS check not working?

Posted: 12 Apr 2017 14:13
by shawniverson
Try adding "reject_unknown_client_hostname" to this config.