The Spam and Open Relay Blocking System

Status:	Active
Website:	www.sorbs.net
Removal:	www.sorbs.net/overview.shtml

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. SORBS maintains 17 distinct DNSBL zones.

Listing Policy

A SOCKS Proxy is very much like the aforementioned http proxy server with one small difference. In general, a proxy server is primarily used for proxying http traffic, whereas a SOCKS proxy can middleman any type of traffic it is configured for. These are the most dangerous kinds of open proxies as they can be used to anonymously and blindly proxy SMTP email traffic. Having an open SOCKS proxy will add your IP address to the socks.dnsbl.sorbs.net blacklist.