RDNS_NONE for all mails on plesk 12 with Mailenable and Spamassassin

Created:

2016-11-16 13:07:22 UTC

Modified:

2017-08-08 13:43:01 UTC

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RDNS_NONE for all mails on plesk 12 with Mailenable and Spamassassin

Applicable to:

  • Plesk Onyx for Windows
  • Plesk 12.0 for Windows

Symptoms

Incoming mails are blocked by spam filter and tagged by Spamassassin:

"*  2.4 RDNS_NONE Delivered to internal network by a host with no rDNS"

Mail example:

X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
domain.tld
X-Spam-Flag: YES
X-Spam-Level: **
X-Spam-Status: Yes, score=2.8 required=1.0 tests=HTML_MESSAGE,MIME_HTML_MOSTLY,
RDNS_NONE,TVD_SPACE_RATIO autolearn=no autolearn_force=no version=3.4.0
X-Spam-Report:
* 0.4 MIME_HTML_MOSTLY BODY: Multipart message mostly text/html MIME
* 0.0 HTML_MESSAGE BODY: HTML included in message
* 2.4 RDNS_NONE Delivered to internal network by a host with no rDNS
* 0.0 TVD_SPACE_RATIO No description available.
Received: from server.domain.tld ([1.2.3.4]) by domain.tld with MailEnable ESMTP; Wed, 23 Sep 2015 22:45:56 +0200
Received: (qmail 25642 invoked from network); 23 Sep 2015 22:50:03 +0200
Received: from 4.3.2.1.example.com (HELO seuzachAH2014) (1.2.3.4)
by domain.tld with SMTP; 23 Sep 2015 22:50:03 +0200
From: "admin - [ example.com ]" <admin@example.com>
To: <anmin2@example.com>
Subject: *****SPAM***** asdfadsf
Date: Wed, 23 Sep 2015 22:45:44 +0200

Cause

  • Manually created directories in %plesk_dir%\\Additional\\SpamAssassin folder
  • Version missmatch of %plesk_bin%\\SpamAssassin.dll

Resolution

  1. Backup folder %plesk_dir%\\Additional\\SpamAssassin
  2. Remove SpamAssassin through %plesk_bin%\\ai.exe
  3. Remove directory %plesk_dir%\\Additional\\SpamAssassin
  4. Install SpamAssassin back through %plesk_bin%\\ai.exe
  5. Switch on spam protection in Plesk and check it.
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