SORBS

from Wikipedia, the free encyclopedia

SORBS (Spam and Open Relay Blocking System) is a controversial DNSBL system, abbreviation for DNS-based Blackhole List, for listing open proxies / relays and spam-sending servers by the British Matthew Sullivan, who is currently based in Australia. It consists of several independent lists that contain hosts classified in different ways (e.g. hosts of spammers, open relays, cracked servers ...). This allows a more precise configuration of the mail server.

Controversial SORBS rule is that spammers have to pay $ 50 to the Joey McNicol Legal Defense Fund, or any other nonprofit institution that informs SORBS of the payment, in order to be removed from the list if countermeasures are not taken. who understandably solved the problem that caused the spam. This can be done with ISPs e.g. B. can be achieved by a termination of the spam sending customer.

The SORBS-DNSBL project was launched in November 2002. It was initially maintained as a private list until it officially went public on January 6, 2003. At that time the list consisted of 78,000 proxy relays, in February 2006 it already comprised approx. 3,000,000 entries and since 2012 more than 12 million.

SORBS is sometimes criticized because well-known e-mail providers are listed again and again. In the past these included more or less regularly Gmail , Hotmail , web.de , freenet.de , GMX , Strato and T-Online . This practice means that if the SORBS-DNSBL is used too uncritically, legitimate e-mails from numerous users are blocked. This impairment can be avoided by whitelisting larger providers; a useful whitelist is the DNSWL, for example. The proportion of spam, which has increased again due to the high proportion of forged sender addresses, can be negated by using SPF .

Individual evidence

  1. ↑ http://www.us.sorbs.net ( Memento from February 9, 2006 in the Internet Archive )
  2. ↑ http://www.sorbs.net ( Memento from June 13, 2012 in the Internet Archive )
  3. ↑ heise.de: GFI wants to help SORBS on the jumps. December 13, 2010.
  4. ↑ dnswl.org: Email Reputation - Protect against false positives.

Web links

  • SORBS.