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 * * 
   * Spam Fighting FAQ
   * Open Proxy Info
   * Securing Mailservers
   * ISP/Company FAQ
   
 * * User Manager
   * Net Manager
   * Report Manager
   * Database Check
   * Help & Support
   * DNS Manager
   * 
   * Company Manager
   
 * * Help & Support
   * Mail/Contact Form
   * Support Request FAQ
   
 * Listing & Delisting
   * (De)Listing Overview
   * Proxy Retest FAQ
   * Relay Retest FAQ
   * Spam Database FAQ
   * Dynamic IP FAQ
   * Zombie Netblock FAQ
   * Vulnerability FAQ
   
 * * 
   * SORBS Submissions
   * 
   
 * General
   * 
   * 
   * Using SORBS
   * 
   * Database Check

The Spam and Open Relay Blocking System (SORBS) was conceived as an anti-spam
project where a daemon would check "on-the-fly", all servers from which it
received email to determine if that email was sent via various types of proxy
and open-relay servers.

 



 




Introduction

The SORBS (Spam and Open Relay Blocking System) 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.  The list typically includes email servers suspected of
sending or relaying spam, servers that have been hacked and hijacked, and those
with Trojan infestations. In an attempt to provide preemptive protection, SORBS
also lists servers with dynamically allocated IP addresses. 

If you have a support issue, please use our Get Support form.

New manager tools are in development for our registered users to help manage
their IP netblocks.  The tools are currently in early access.  If you are
interested in these tools, please click here: Net Manager.

If anyone would like to contribute to SORBS or has any suggestions for new
detection routines, and/or hosts to be listed, the SORBS team would love to hear
from you. Please use the Mail/Contact Form to get in touch and discuss your
thoughts.


 

   
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