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 Blocklist Removal Center. From here you will be able to enter your IP or Domain and begin your request for removal.
Please note that the Project’s Blocklist Removal Center 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.
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 blocklists updated in real-time. 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.
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.
Find out who we work with and how you can become a Spamhaus Partner.
Discover a wide range of blog posts, case studies and reports.
Commonly asked questions about Spamhaus products and processes.
In depth information about the technical details and implementation of our products.
Posted by The Spamhaus Technology Team on 5 Oct 2018
High-speed and high-volume: Hailstorm spam is one method cyber criminals are using to overwhelm target organizations’ defenses, but Spamhaus is leading the fight back with threat intelligence delivered at high-speed.
Dynamic Updates from Spamhaus protect by alerting you to hailstorm attacks within seconds of them starting, giving you the unique capability to block this type of spam.
Hailstorm attacks can be over in a matter of minutes and every second counts.
At the first indication of a hailstorm attack, automatic incremental updates are made available. Instead of downloading a full set of IP and Domain-based threat intelligence periodically, Dynamic Updates allow you to receive data as soon as it is available.
In three minutes, more than 15,000 spam messages sent –85% blocked by DynamicUpdates service at start of attack. Indicative real case example– individual attack profiles will vary.
Table showing how dynamic updates compares to DQSIncluded is Spamhaus’ Zero Reputation Domain (ZRD) service, designed to stop cyber criminals who use newly registered domains. This is a favoured method to send hailstorm spam; driving traffic to websites in the hope that users will fall victim before a domain has been analyzed for its reputation.
Legitimate organizations 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 block list for 24 hours.
Deploy Dynamics Updates in minutes following these easy steps:
If you are already consuming Spamhaus Rsync please contact us here to find out more about our Dynamic Updates.
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.
15 April 2020
The number of botnet Command & Controllers (C&Cs) associated with fraudulent sign-ups, reduced by 57% in Q1 2020, however it isn't all good news. Find out the full details on botnet C&C activity here.
29 October 2019
In this Osterman Report, over 200 companies were interviewed to find out how they were utilizing threat intelligence data. Compare yourself to the market place, and find out how others are protecting themselves.
25 March 2019
Spamhaus’ blocklists, used with specially configured SpamAssassin, stop over 99% of spam email. It's an effective combination that won't break the bank.