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.
Posted by The Spamhaus Team on 6 Oct 2023
Spamhaus are proud to partner with Halon – a leading email infrastructure software for service providers. We join forces to provide robust, reliable, and cost-effective protection against malicious email. By integrating Spamhaus’ real-time threat intelligence data with Halon Protect, over 99% of email-borne threats can be blocked to safeguard your email stream.
As leaders in email infrastructure software, Halon offers innovative, secure, and flexible solutions. With a mission to empower its users to control and maximize email, threat protection plays a pivotal role.
Using Halon Protect, mailbox providers are equipped to detect, analyze, and prevent inbound and outbound threats from infecting their network. By applying the appropriate filters and checks at the right time, users can manage and protect their email, keeping costs low and efficiency high.
To increase catch rates and enhance email protection, Spamhaus’ real-time DNS blocklists (DNSBLs) are integrated with Halon’s email infrastructure. This prevents over 99% of malicious email from reaching user’s mailboxes – including spam, phishing, malware files, malicious crypto wallets, and more.
This instantly recovers bandwidth, servers & storage costs typically lost when accepting and processing spam. And with just a few clicks, users are immediately protected, utilizing the continuously updated IP, Domain & Hash data, made available using Spamhaus’ Data Query Service (DQS). With Halon Protect and Spamhaus’ real-time DNS blocklists, users gain robust, reliable, and cost-effective email protection in minutes, with industry-leading false positive rates.
Spamhaus DNSBL’s are integrated with Halon Protect in the mail transfer agent (MTA). To ensure filtering is as efficient as possible, this is a staged process.
The MTA-level blocking works by firstly rejecting email from IP addresses contained in Spamhaus DNSBL’s at the SMTP connection – this eliminates most of the junk messages. When an email is blocked, the sender is notified immediately, ensuring emails are not left in junk folders for weeks without being checked.
For anything not blocked at the SMTP connection, email content can be filtered by checking against Spamhaus’ domain and hash data. This two-staged approach to email filtering is considered best practice:
Halon clients can also provide Spamhaus with SMTP data. Some malicious email campaigns are targeted to a country, industry or indeed a company, so providing this data means users benefit from tailored protection, automatically blocking targeted attackers. This is carried out without any transfer of personally identifiable information (PII) – only IP address, HELO string, and timestamp data are shared.
Any Halon Protect client can benefit from this enhanced solution feature. And activation is easy. Sign up for a free 30-day trial with Spamhaus and receive a query key. Enter the query key into Halon’s web interface and get immediate real-time protection in minutes.
Existing Halon Protect clients already benefit from some IP protection from Spamhaus. This drops IP addresses that are observed to be involved in sending spam, snowshoe spamming, bulletproof hosting companies, and hijacked IP space. However, this is far from the full suite of data to provide +99% protection.
To understand more about the additional data available, and how this will further safeguard your email stream, please speak with your Halon representative.
Email-based threats are becoming increasingly sophisticated. Users should have the ability to stay protected with ease, without making frequent updates, safe in the knowledge a team is focused on detecting evolving threats on their behalf, 24/7. This is why the Spamhaus/Halon partnership is so important. Users can gain world-class protection, in minutes, with no further work after set up.
As Tara Natanson, Manager of ISP Relations at Constant Contact shares about the data, “There are a lot of blocklists out there but the only one that’s ever been super trustworthy has been Spamhaus.”
Spamhaus are thrilled to be partnered with the Halon team, joining forces to better protect email, and making the internet a safer place. Similarly, Anders Langsved, CEO at Halon shared: “Halon’s partnership with Spamhaus reinforces our commitment to delivering the most advanced email infrastructure solutions to our clients whilst ensuring that protection is available at every turn. Through our current and future integrations with Spamhaus, we will deliver on our common mission to make the email space a safer place“.
For more information about the integration, see here.
Alternatively, if you’re already using Halon Protect or would like to learn more, you can contact Halon directly.