Service Termination Notice Please note that this service has been decommissioned and will no longer contain reputation data (all queries will return NXDOMAIN).

The SORBS (Spam and Open Relay Blocking System), owned and operated by Proofpoint, Inc., provides free access to its DNS-based Block List (DNSBL) to effectively block email from more than 12 million host servers known to disseminate spam, phishing attacks and other forms of malicious email.

Using SORBS with the Sun Internet Mail Server (SIMS) Chapter 6 of the Admin Guide for SIMS 4.0 details the 2 ways of stopping spam with the SORBS DNS block list. The first (and the recomended way) is to add a mapping table rule such as:

FAQs and Info. ISP/Company FAQ; General FAQ; Dynamic IP FAQ; Spam Database FAQ; Table of Contents

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If you are unsure about how to get de-listed, or want to know some of the reasons behind the blocking, please use the SORBS Support System.

How-To / Tutorials Authentication and Authorization. Authentication is any process by which you verify that someone is who they claim they are.

In order to effectively manage a web server, it is necessary to get feedback about the activity and performance of the server as well as any problems that may be occurring.

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The Prerequisites. The directives discussed in this article will need to go either in your main server configuration file (typically in a <Directory> section), or in per-directory configuration files (.htaccess files). If you plan to use .htaccess files, you will need to have a server configuration that permits putting authentication directives in these files.