Spamhaus Community
Community is at the heart of Spamhaus, with a global network of organizations and contributors helping us protect the internet through shared threat intelligence. And that sharing goes both ways: access free data, tools, and resources, and become part of our data-sharing community.
Free Data
Driven by a mission to enhance internet trust and safety, we provide free data to enable small businesses and those querying low volumes to defend themselves against cyber threats. Access reliable, threat intelligence data on malicious IPs, domains, and more - all at no cost.
Intelligence API Developer License
Developers and security researchers get a 6-month Spamhaus Intelligence API developer license, providing context-rich metadata on malware URLs, IP and domain reputation.
Real-time DNS Blocklists
For low query volumes, access a wide-range of DNSBLs covering IPs and domains to protect your email infrastructure, wider network, and users - available free of charge.
Response Policy Zones (RPZ)
Anyone managing DNS infrastructure, can automatically block IPs flagged as hijacked, linked to bullet proof hosters, or are being leased by professional malicious organizations - using free DNS RPZ data.
Contribute Data
Sharing data is like joining a global neighborhood watch — by working together, we create a safer, more resilient community. Contribute data to Spamhaus through the Threat Intel Community or share large volumes directly to help protect everyone.
An established way to share data
Join a community and share IPs, domains, URLs or raw source of potentially malicious activity via the Spamhaus Project Threat Intel Community - make one off contributions or access the API.
Looking for another way?
If your organization has specific needs or contracts, we’d love to talk about how you can easily and securely share threat intelligence directly with Spamhaus.
Spamhaus Know How
Discover a wealth of resources—from eBooks to best practices—related to email, network and cyber threat intelligence.
eBook
The aim of this eBook is simple: to make it easier to understand how to use IP, domain, and content reputation data to protect your email stream, your users, and your network.
eBook
Whether you're new to sending email or you're a deliverability veteran, this eBook brings together best practices and practical tips for you to achieve consistent email deliverability.
Resources
Reputation gives us a parameter for if, when, and how we engage with a domain. But what really is it, who's using this threat insight, and how does it impact you?
eBook
Everything you need to know about DNS blocklists, but don't like to ask.
Free Tools
Explore our free tools to ensure your configurations are working correctly and to monitor the reputation of your IPs and domains - stay protected, stay informed.
Blocklist Tester
An easy to use free tool that helps you check your email configuration is correctly set up to use Spamhaus' DNSBLs.
IP AND DOMAIN REPUTATION CHECKER
Use the checker to see if your IP address or domain appears on any Spamhaus blocklists. Quickly identify listings and access guidance on next steps.
HAVE YOU BEEN BLOCKED?
The Spamhaus Project maintains the blocklists. Use the checker to see if your IP address or domain is listed.
Need Help?
Get in touch
Spamhaus is committed to protecting and respecting your privacy. We’ll only use your personal information to respond to your enquiry, manage any accounts you may set-up, and to provide the products and services you request from us. From time to time, we would like to contact you about our products and services, as well as other security related content that may be of interest to you. If you consent to us contacting you for this purpose, please tick the box below.
You can unsubscribe from these communications at any time. For more information on how to unsubscribe, our privacy practices, and how we are committed to protecting and respecting your privacy, please review our Privacy Policy.
By clicking submit below, you consent to allow Spamhaus to store and process the personal information submitted above to provide you the content requested.
I agree to receive other communications from Spamhaus.