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.
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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 Fraser Camfield on 3 Jul 2018
There are a number of Internet Service Providers (ISPs), along with their customers, who are unwittingly missing out on the opportunity to have uninterrupted access to Spamhaus’s commercial grade threat intelligence. Here’s how to ensure you stay protected with our domain name server block lists (DNSBLs), and furthermore, increase the value of the service you provide to your customers.
There are multiple solutions, feeds and services in the commercial anti-spam marketplace. Currently three billion mailboxes, for those of you who like precise numbers, click here for today’s exact number, are being protected by Spamhaus’s business grade data feeds.
These DNSBLs are updated around the clock by a highly experienced group of security researchers, whose sole focus is to track spam and cyber related threats, such as phishing, malware and botnets. Malicious emails are blocked before they even reach your inbox reducing storage costs, bandwidth usage, and of course, increasing your email security.
Good question. Keep reading.
Occasionally large scale users like to avail themselves of Spamhaus’s free DNSBL servers. Spamhaus has always believed in protecting individuals, small businesses and nonprofit organizations for free. Over the years a global network of over 80 DNSBL servers has been built, serving billions of queries to the public at no cost, as long as usage is within the limits set out in the policy below:
SPAMHAUS FREE USAGE POLICY
If you are an ISP provider with one, or multiple customers over-querying through your recursive server(s) there is the potential that the recursive server(s) in question will be blocked from the free DNSBL service. Regrettably this means that not only do those who are guilty of abusing the service lose out, everyone does. Moreover it’s highly likely that you would be completely unaware that the service is being blocked.
We understand the inconvenience and potential risks an outage of threat intelligence could mean for all concerned. You, as the ISP, stand to lose the free service (as long as you are using it within the stated query and traffic volumes), but additionally your customers stand to lose it too. Even worse – there’s a high probability that your customers would be completely unaware of the fact they are not protected.
We all know you can’t keep everyone happy all of the time, but we like to try. Therefore we offer users of Spamhaus’s free DNSBL servers access to our Data Query Service (DQS). This DQS has multiple advantages:
All you need to do is share this message with your customers, to ensure there are no potential access issues to the Spamhaus DNSBL for anyone. We suggest dropping your marketing team a note to see how they could help you communicate this information to your customers.
An alternative route, and one many ISPs take, is to increase the value of your service offering by providing this added layer of email protection to your customers’ mailboxes for free. “Ouch” we hear you say, “that’s going to be expensive”. Don’t jump too hastily to that conclusion – connect with us today to find out what the actual costs would be to your ISP business. After all, a phishing attack or potential loss of business is likely to be far more costly.
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.
18 May 2020
It's a well-known fact that filtering emails using IP blocklists (DNSBLs) blocks the vast majority of malicious emails. It's effective and economical, using minimal computational power. So why should you also use domain and hash blocklists for filtering?
IP & Domain Blocklists (DNSBLs) are very effective at filtering malicious emails. However, they do have one big limitation: How do you block an email sent from a compromised account at Gmail, Hotmail or any other large email service provider (ESP)? Hash blocklists are the answer.
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.