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Configuring Kerio Anti-Spam

Author: Central Support Updated

Overview

The Kerio Anti-spam extension uses the Bitdefender online scanning service. It provides an advanced level of spam filtering for incoming messages.

  • In Kerio Connect 9.0.3-9.1.1, Kerio Anti-spam replaces the SpamAssassin's SURBL and Bayes filters. Users do not need to use the Spam and Not Spam buttons in Kerio Connect Client and Microsoft Outlook with Kerio Outlook Connector. Kerio Connect hides those buttons.
  • In Kerio Connect 9.2 and newer, you can use Kerio Anti-spam together with Spam Assassin.
  • Kerio Anti-spam is available as an add-on. Without Kerio Anti-spam, you can still use the standard anti-spam features in Kerio Connect.

This article provides instructions on how to configure Kerio Anti-spam.

 

Process

  1. In the administration interface, go to Configuration > Content Filter > Spam Filter.

  2. Switch to the Kerio Anti-spam tab.

  3. Select Enable Kerio Anti-spam advanced filter.

  4. Set the Contribution to spam rating. The value of the setting affects only spam messages:

    • If SpamAssassin is disabled, you can set the Kerio Anti-spam settings (Filter contribution to overall spam score) to 2-18.

      001.png

    • If SpamAssassin is enabled, you can set the Kerio Anti-spam settings (Filter contribution to overall spam score) to 1-9.

      002.png

      NOTE: In Kerio Connect 9.1.0 and 9.1.1, you can set this value to moderate = 6, normal = 10, high = 14. In Kerio Connect 9.0.3 and 9.0.4, this value also affects non-spam messages: moderate = 1, normal = 2, high = 3.
  5. Optional: To allow Bitdefender to save the encrypted data from Kerio Connect, select the Allow signatures and metadata to be utilized for enhancing the online scanning service.
    NOTE: In Kerio Connect 9.0.3-9.1.1, select Allow the use of spam and Allow the use of non-spam options.
    Bitdefender saves only the encrypted data, not the entire messages.

    003.png

    NOTE: If you're using Kerio Connect Multi-Server, enable Kerio Anti-spam on the Front-end server.

 

Additional Steps

 

Kerio Connect on Debian 6

If you install Kerio Connect on the Debian 6 operating system, you must run the following command before initializing Kerio Anti-spam:

wget --no-check-certificate https://www.thawte.com/roots/thawte_Primary_Root_CA-G3_SHA256.pem cp thawte_Primary_Root_CA-G3_SHA256.pem /etc/ssl/certs cd /etc/ssl/certs/ ln -s thawte_Primary_Root_CA-G3_SHA256.pem ba89ed3b.0

 

NOTE: If you are upgrading from a previous version, restart Kerio Connect after you enable Kerio Anti-spam. If any problem with Kerio Anti-spam occurs, consult the Debug log article.

  1. Right-click in the Debug log area, and click Messages.

  2. Select the Kerio Anti-spam Processing, SpamAssassin Processing, and Spam filter options.

    004.png

    NOTE: After debugging, clear those options. Otherwise, the logging may slow down server performance.

 

Related Article

Spam/Not Spam buttons disappeared from Webmail 

 

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