The Spamhaus Project

The Spamhaus Project is an international nonprofit based in Andorra that tracks spam and cyber threats worldwide. The organization was founded in 1998 in London.

Products & Research

Spamhaus maintains and distributes a number of block lists that assist in the prevention of exploits, spam, and malware from corrupted links. Many of Spamhaus' services may be used free of charge, so long as that use is "non-commercial" and the user is a "small [or] medium sized" organization that makes calls to Spamhaus servers or mirrors at a volume "reasonably expected in circumstances of non-commercial use." Large organizations or commercial providers may use Spamhaus services by subscription.

Spamhaus Block Lists

Spamhaus maintains a large number of DNS-based block list (DNSBL) servers across the world, to facilitate queries to its various block lists. In addition, it offers router and firewall software packages to facilitate safe browsing of the Internet. The organization maintains block lists for spam, exploits and malware, abuse policy monitoring, and low-reputation domains.

Spamhaus Botnet Threat Updates

Spamhaus publishes quarterly and annual reports of botnet activity, trends in botnet growth, innovations in resiliency of botnets, and most-abused TLDs.