Contacts  |  Official Statements  |  Sponsors  |  FAQs  |  News Blog   
About Spamhaus
Corporate Documents

Spamhaus Statements
Futureproofing Spamhaus
Strategic Partners
Spamhaus in China
Press Office
Organization Addresses




Spamhaus Userbase
At 02 September 2010 the Spamhaus Blocklists are protecting 1,450,606,000 users mailboxes
Source: Spamhaus Datafeed service
The Spamhaus Project is an international nonprofit organization whose mission is to track the Internet's spam operations, to provide dependable realtime anti-spam protection for Internet networks, to work with Law Enforcement Agencies to identify and pursue spammers worldwide, and to lobby governments for effective anti-spam legislation.

Founded in 1998, Spamhaus is based in Geneva, Switzerland and London, UK and is run by a dedicated team of 28 investigators and forensics specialists located in 8 countries.

Spamhaus maintains a number of realtime spam-blocking databases ('DNSBLs') responsible for keeping back the vast majority of spam sent out on the Internet. These include the Spamhaus Block List (SBL), the Exploits Block List (XBL), the Policy Block List (PBL) and the Domain Block List (DBL). Spamhaus DNSBLs are today used by the majority of the Internet's Email Service Providers, Corporations, Universities, Governments and Military networks.
To meet public demand for its DNSBLs, Spamhaus has built one of the largest DNS infrastructures in the world. Its network of over 60 public DNSBL servers spread across 18 countries serves many billions of DNSBL queries to the public every day, free of charge.

The number of internet users whose mailboxes are currently protected by Spamhaus DNSBLs now exceeds 1.4 Billion (actual number is published under 'Spamhaus Userbase' on the left of this page).

In addition to generating spam filter data and publishing realtime blocklists, Spamhaus publishes the Register Of Known Spam Operations (ROKSO), a database collating information and evidence on the '100' known professional spam senders and spam gangs worldwide. ROKSO is used by Internet Service Providers to avoid signing up known spammers who would abuse their networks and by Law Enforcement Agencies to help target and mount prosecutions against professional spammers.

Spamhaus CEO Steve Linford speaking at the European Parliament
The Spamhaus Project's teams and staff are volunteers. Infrastructure is provided courtesy of industry sponsors and autonomous organizations that provide services to the spam filter industry utilizing Spamhaus data and technologies.

Funding for operations is through sponsors and donations from industry, including from The Spamhaus Foundation,
a private Foundation whose charter is to assure the long-term security of The Spamhaus Project and its work.

The Spamhaus team works with Law Enforcement Cyber Crimes teams worldwide, assisting investigations into spam senders, phishing, botnets and malware operations, and compiling profiles, backgrounds and evidence on spam gangs and spam operations.

Spamhaus is a member of the main Law Enforcement work group dealing with international cybercrime issues, and a member of the main Internet Industry work group set up to deal with spam and abuse issues. These include:


London Action Plan (LAP)

Messaging Anti-Abuse Working Group

Spamhaus's LEA working partners are:


National Cyber-Forensics
and Training Alliance

Federal Bureau of Investigation

The Spamhaus investigative and forensic team has played key roles in many prosecutions of spammers and spam gangs and has been awarded by law enforcement for its work in fighting cyber crime.

The Spamhaus Project Organization:
18 Avenue Louis Casai, CH-1209, Geneva, Switzerland
The Spamhaus Project Ltd. Registered Office:
26 York Street, London W1U 6PZ, United Kingdom
A nonprofit company limited by guarantee.
Registered in London, England. Company No. 05303831.
Spamhaus and the Spamhaus Logo are ® Registered Trademarks of The Spamhaus Project Ltd.
© 1998-2010 The Spamhaus Project Ltd. All rights reserved.
Legal  |  Privacy