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.
Find a parter
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 Natale Bianchi on 11 Nov 2020
Running your own email server is so 1995, right? Why would anyone go to all that trouble when you can outsource email to a third party and let them manage it? Let's STOP a moment, and before we (and our precious data) all merrily rush off to third party providers, let's consider some of the advantages of managing your own email infrastructure.
No industry or company is the same. We all have different ways of working, and that includes different risk profiles. A medical facility will have an entirely different security posture to that of a high street retailer. One size does not fit all!
To meet the specific requirements of your company’s risk profile, you can customize your email stream. For instance, you can adjust your spam filters to aggressively block countries from which you never receive email or guarantee acceptance for messages matching specific patterns, commonly known as whitelisting.
You may be questioning whether you want this burden. Nonetheless, data is a precious asset, and your company’s email stream is part of that asset. There have been plenty of stories over recent years of data harvesting, including the Facebook data privacy scandal.
When an email is in transit, it will have end-to-end encryption, no matter if you manage your own email infrastructure or outsource it to a third party. However, when that email is sitting on a server, having been delivered, it is unencrypted. This leaves it open to inspection by a third party, should they make it their mission to do so.
We’ve observed cases in the past where a provider’s terms and conditions allowed it to search the content of their customer’s emails to aid in targeting adverts!
A security breach excepted, if you’re running your own email server, your emails’ content can’t be accessed by any other entity.
If you outsource your email, the data may become subject to the regulations of the country your provider is based in. For example, if your provider is situated in the USA, and the USA government requires your data to be shared, your provider will have to hand it over.
We’re not saying that other countries’ governments won’t approach you to get their hands on your data if they require it, but you will have a greater awareness and control over what happens.
Outages happen – it’s a fact we’re all aware of. Not so long ago, Microsoft suffered service issues that affected users across the globe for hours. Not having control of situations like this can be challenging. However, if you are directly responsible for your email infrastructure, you have direct control. You are in charge of your own destiny.
Even if you have the best emailing practices in the world, if your email is being hosted on the same email server as an organization that is spewing out spam and other malicious emails, there is a chance that you may get listed on a blocklist.
This chance increases significantly if the provider managing that email server is slow to respond to abuse reports and allows dubious organizations to continue operating on their network, causing reputation to plummet.
“Hold the line, reader. We are currently experiencing high levels of calls. Your call is important to us and will be answered…in forty minutes.” At one point or another, we’ve all experienced frustration when trying to resolve a business-critical issue via a help or support desk. Either response times are slow or technical knowledge can be lacking.
If you run your own mail server, you’ll be able to remediate failed message deliveries and other related issues rapidly. Particularly useful is the ability to look at the reasons behind false positives and fix them immediately.
No! We understand that managing your own email infrastructure isn’t for everyone. Indeed, where email servers aren’t correctly set-up, multiple problems can arise, including security and deliverability issues.
However, we believe that IT teams and those at an Executive level need to make careful considerations as to how they manage their email, including the advantages of bringing it back in-house. If this is something you’re looking to do, or already doing, read our top tips for running your own email server sharing simple actions to make this a success.
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.
2 November 2022
As of Wednesday, November 9th, the CSS dataset will start to grow. We anticipate the addition of 1.5 million listings over the next 4-6 months; that's approximately a 100% increase! Find out why and the impact to you in this blog.
11 November 2020
DNS blocklists should be your first line of defense against spam and other email-borne theats. Here is an intro to some DNSBL fundamentals.
Here are 11 ways to help email administrators make running their own email infrastructure a success.