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)
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.
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.
Find out more about us.
Learn more about Spamhaus; who we are, and what we do.
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Discover our partners and how they can support you.
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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.
ASN owners - assess your network, manage your reputation, and resolve your listing issues.
Gain visibility and proactively manage your IPs’ reputation.
For ASN owners, this portal provides free access to reputation data relating to your network, allows you to get regular updates via email or API, and offers a quick removal process with the ability to track submissions via a Ticket Center.
If your organization owns at least one ASN then you can register for an account.
Please note that it can take up to 48 working hours for your IPs and reputation data to populate.
The portal gives you visibility as to what IP addresses are listed in the Spamhaus blocklists/datasets, the information on why the listing has occurred, and how to resolve the issue and request removal. Additionally, you can sign up for listing notifications, via email or API allowing you to pro-actively deal with issues.
Dashboard – This provides you with an overview of your network including:
CIDR/Network ranges with listing overview – This area lists all your ranges by /24 and details the number of records you have on the following datasets:
You can sort all visible fields and view them by the number of records or percentage.
This displays individual IP addresses in a /24 and highlights the datasets they appear on. From here, you can click on the single IP to view the listing detail and request removal.
Listing information – this details all the different datasets the IP address appears on. Where you are listed on more than one dataset, you will need to address the initial listing before you can request removal from subsequent ones.
NOTE: When you request removal, please ensure that you have resolved the issue that caused the listing to occur in the first place.
Ticket Center – View all your removal requests and their status.
Reporting preferences – choose how you receive your reputation updates via email every 24 hours or via API, which is updated hourly.
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.
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.
If you own at least one ASN you can register to use the Reputation Portal - and it's free!
16 August 2022
The recent spate of informational listings from The Spamhaus Project researchers created waves in the sending community. But more pertinently, it’s highlighted poor sending practices. Here’s further explanation, and helpful hints and tools to help calm the waters.
7 July 2022
If you own at least one ASN and want visibility of your IPs' reputation across your network, we recommend you find out more about the Spamhaus Reputation Portal.
25 May 2022
In our experience, residential proxies are an often overlooked security threat; one that can be very difficult to remediate for the end user who -in our experience- is entirely unaware of its existence.