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For over two decades, Spamhaus has been making a difference. From launching threat intelligence through IP and domain blocklists to working with law enforcement cybercrime units. Industry groups around the world have recognized Spamhaus' contribution to making the Internet safer. The Spamhaus Project was founded in London by Steve Linford and incorporated as a British not-for-profit Limited Liability Company. The first zone of our IP datasets, focused on the intelligence derived from manual investigations undertaken by our threat hunters and forensic specialists. Today this team has grown into our Open Source Intelligence (OSInt) team, and they are still producing the Spamhaus Blocklist (SBL), which protects billions of mailboxes. Awarded for "educating people… endeavoring to thwart spammers, and urging the US to reject the opt-out approach to spam legislation”, by the Internet Service Providers Association. A proactive list of IP addresses that should not be sending unauthenticated emails, which is managed by both network owners and Spamhaus. Today, the Policy Blocklist (PBL) includes dynamic IP addresses assigned to residential users and IPs marked by providers as not intended for email sending. Recognized by the National Cyber Forensics and Training Alliance, “in appreciation and acknowledgment of your [Spamhaus’] contribution to fighting cyber crime.” The first zone of our domain datasets, now capturing rich, proactive data points for context and insight on domain-related signals, and to provide automatic, real time protection. When you stop bad actors from executing an attack, they often try to seek revenge. One such attempt resulted in "the DDoS that almost broke the Internet." The attack generated over 300Gbps of traffic and was controlled by employing robust defences and collaborating with our DDoS mitigation service provider. Spamhaus provided threat mitigation assistance in Jan 2021, after Europol announced a coordinated group of international authorities had taken control of the Emotet infrastructure. In August 2023, the FBI announced a coordinated international group of law enforcement authorities had taken control of the Qakbot infrastructure, with Spamhaus’ assistance in remediation efforts. Spamhaus provided remediation assistance in May 2024, after a coalition of international law enforcement agencies, led by Europol, coordinated the largest ever operation against botnets involved with ransomware.

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