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.
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From clicking on phishing emails to visiting malware dropper sites, our threat intelligence provides automatic protection for your users.
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Border Gateway Protocol (BGP)
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.
A wide range of datasets, providing multiple layers of protection. They can be plugged directly into your existing hardware, making them an affordable choice.
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.
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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.
Find out more about us.
Learn more about Spamhaus; who we are, and what we do.
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Discover a wide range of blog posts, case studies and reports.
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.
Posted by Barry Branagh on 6 Dec 2016
Research by Spamhaus has driven the development of the new Zero Reputation Domain service designed to thwart cyber criminals who use newly-registered domains to send spam and drive traffic to harmful websites hoping that users will fall victim before a domain has been analysed for its reputation.
Legitimate organisations will rarely activate a domain and start using it immediately after registration so the ZRD automatically adds newly-registered and previously dormant domains to a blocklist for 24 hours. This protects users from clicking on links and visiting domains until it can be firmly established that they are not associated with zero day attacks, phishing, bot-herding, spyware and ransomware campaigns. The ZRD blocklist is already proving its worth in a pilot with a UK-based email security service provider.
“After enabling the Spamhaus ZRD, I immediately saw a reduction in the amount of spam that needed expensive content scanning by around 33% as we could reject it outright.”
“Normally I would get quite excited at something that reduced this by approximately 10% and the ZRD varies by day between to around 20-30% and those are unique hits which are not caught by other lists, so it’s pretty incredible.”
It’s also hitting exactly what I hoped it would – domains that are registered and used in spam immediately that have been difficult to catch.”
Existing Spamhaus users can enable ZRD as a Data Query Service by contacting their usual local re-seller.
Users who are new to Spamhaus can sign up for a free 30-day trial (Link to https://www.spamhaustech.com/free-trial/)
ZRD complements existing Content Blocklists generated by Spamhaus’ global team of security researchers who maintain constantly updated domain-based blocklists using data compiled from a range of live sources.
Sign up for a free 30-day trial
Spamhaus’ Data Query Service (DQS) is an affordable and effective solution to protect your email infrastructure and users.
Using your existing email protection solution, you will be able to block spam and other related threats including malware, ransomware, and phishing emails.
The service has never failed and utilizes the longest established DNSBLs in the industry.
5 May 2020
Instances of domain hijacking are on the increase, and the fall out for victims can be significant. Join ISC and Matt Sith, from Spamhaus to discover how big a problem domain hijacking is and learn how to protect against it.
29 October 2019
As IT budgets and resources are squeezed it's understandable to shop around, be it for hardware, software, or threat intelligence data, for that matter. But beware...not all email blocklists (DNSBLs) are equal.
5 December 2018
If you are a current Rsync customer with under 50,000 users it's likely that you will find it beneficial to migrate to our Data Query Service.