Have you been blocked?
All blocklists are researched and managed by The Spamhaus Project.
Simply click on the link below, which will take you to the Project’s IP and Domain Reputation Checker. From here you will be able to enter your IP or Domain and begin your request for removal.
Please note that the Project’s IP and Domain Reputation Checker is the only place where removals are handled.
IT and security teams consistently face multiple business challenges. Discover how our solutions can help overcome some of those issues.
From processing issues, to email-borne threats our blocklists easily integrate with your current email set-up to improve anti-spam & anti-virus email filtering.
Employ our threat intelligence to increase visibility across security events, reveal potential weaknesses in your network, and threats to your brand.
Stay on top of the latest threats and proactively combat botnet infections, and other forms of abuse, with our solutions.
From clicking on phishing emails to visiting malware dropper sites, our threat intelligence provides automatic protection for your users.
Data for Integration
Enhance your service and create competitive advantage by integrating Spamhaus’ world-class IP and domain reputation data.
Our products provide additional layers of security for networks and email. They also present security teams with additional insight into malicious behavior.
Border Gateway Protocol (BGP) Firewall
Block the worst of the worst at your network edge, taking advantage of your existing BGP-capable routers. Configuration only takes minutes.
Data Query Service (DQS)
Benefit from industry-leading real time blocklists. These DNSBLs easily plug into your existing email infrastructure to block spam and other email threats.
A powerful research tool to investigate relationships between internet infrastructures. Quickly pivot to new areas of concern to rapidly investigate potential threats.
Immediately block connections to dangerous sites, including phishing and malware dropper websites. A ‘set and forget’ solution.
Spamhaus Intelligence API
Threat intelligence data in API format to enable users to easily integrate metadata relating to threats with their own applications, programs, and products.
abuse.ch Real Time Feeds - coming soon
Actionable data signals on cyber threats, with a focus on malware and botnets, to strengthen threat investigations, detections, and help prevent data breaches.
Integration | MDaemon
Block over 99% of email-borne threats with Spamhaus’ real time DNS blocklists and MDaemon® Email Server.
Integration | Halon
Safeguard your email stream using Spamhaus’ real time DNS blocklists and Halon’s secure email infrastructure.
Integration | Messageware
Enhance Microsoft Exchange protection by blocking malicious IP addresses from connecting to your on-premise server in real time.
A wide range of datasets, providing multiple layers of protection. They can be plugged directly into your existing hardware, making them an affordable choice.
Exploits Dataset Statistics
View the geolocation, hosting network, malware names associated with each detection, and other critical data points.
Border Gateway Protocol (BGP) Feeds
Do Not Route Or Peer (DROP) and Botnet Controller List (BCL) datafeeds can peer with your existing BGP-capable router.
Domain (DBL), Zero Reputation (ZRD) and Hash blocklists (HBL) enable you to block content in emails, filtering out a higher rate of email-borne threats.
Data for Investigation
Passive DNS and extended datasets give you additional information on internet resources. They provide deeper insights into incidents and possible threats.
DNS Firewall Threat Feeds
A wide range of feeds to apply to your DNS recursive server. Choose the right level of protection for your organization.
Spam (SBL), Policy (PBL), Exploits (XBL) and Auth (AuthBL) blocklists allow you to filter email from IPs associated with spam, botnets, and other threats.
abuse.ch Threat Intelligence Feeds – coming soon
URLhaus, MalwareBazaar, ThreatFox, YARAify, Feodo Tracker and Sandnet enrich CTI feeds and support vulnerability mangement.
Find out more about us.
Learn more about Spamhaus; who we are, and what we do.
Find a partner
Discover our partners and how they can support you.
Become a partner
Learn about the benefits of being a Spamhaus partner and how to get started.
Discover a wide range of blog posts, case studies and reports.
Spamhaus’ insight into malware, botnet C&Cs, and the domain reputation landscape.
Commonly asked questions about Spamhaus products and processes.
The Blocklist Tester
A tool to help you check if your servers are correctly configured to use Spamhaus DNSBLs.
The Reputation Portal
A tool for ASN owners to get visibility of their IPs’ reputation and proactively manage listings.
Help for the Project's legacy DNSBLs users
Using the Project’s legacy blocklists and suddenly experiencing email issues? This page may be able to help.
In depth information about the technical details and implementation of our products.
Enhance your service and create competitive advantage by integrating Spamhaus’ world-class IP and domain reputation data
To identify internet resources connected with malicious activity, Spamhaus analyzes over 13.4 billion global SMTP connections, 1.5 million IPs, 3 million domains, and 18k malware samples every day.
Gain access to this expertly researched reputation data to enrich your cyber-security products, services, and more.
For 23 years, we have been developing a vast network of sensors to provide the broadest possible view of online networks. Data sources range from government organizations around the world to industry-leading internet providers to specialized researchers, analysts, honey pots, and beyond.
This truly big, raw data is then put under scrutiny with machine learning, robust manual investigations, and heuristics to compile listings of malicious activities into IP, domain, and content-based datasets. The listings are objective, based on policies that have been carefully defined over years with the wider industry, and are now relied on by billions of people every day.
Our IP datasets contain information on IP addresses that have been observed to be involved in sending or hosting spam, connected to hijacked servers or computers infected with botnets. The IP data is broken down into 3 primary datasets:
We also have available the following datasets – subsets of the 3 primary datasets:
Our content datasets contain information relating to content that has been connected to malicious activity – be that compromised domains, crypto wallets such as Bitcoin, malware and email addresses. The content data is broken down into 3 primary datasets:
Available via an API, we also have available the extended DBL (eDBL) containing live and historical metadata to bring context to DBL listings.
There are a variety of options – it really depends on your use case. It can be delivered via:
Or if you have an alternative integration method in mind, or require delivery by API beyond the data listed, please get in touch with your request.
Typically, data for integration is adopted by Product Managers to incorporate into end-user products or Security Operations Managers and Security Incident Event Managers for internal threat intelligence operations.
Datasets providing additional insight into networks and their associated internet identifiers, to reduce investigation times and highlight potential risk.
Constantly updated content-based lists including the Domain and Hash blocklists. These use multiple sources to define whether the entity is involved in malicious activity, or whether it is hosting or sending harmful content.
IP addresses that have been observed to be involved in sending or hosting spam, including hijacked servers and computers infected with botnet malware. These are the longest established blocklists in the industry.
For more information on integrating Spamhaus’ data, or to get set up, fill out this contact form.
30 November 2021
I write this article for all of you out there who aren't deeply embedded in this industry because the people I work with are remarkable. The world should know what they are doing to quietly protect all those who say “Spamwho?” be that your grandma or the network nerd at work.
23 March 2021
Global cybersecurity software company, Red Sift, use the Spamhaus Intelligence API to free up time for their customers while providing important insight on why an IP is blocked.
30 March 2021
In this Osterman Report, 130 cybersecurity professionals were interviewed to find out how the threats of phishing and ransomware are impacting their businesses. Compare yourself to the market place, and find out how others are protecting themselves.