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.
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From clicking on phishing emails to visiting malware dropper sites, our threat intelligence provides automatic protection for your users.
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Block the worst of the worst at your network edge, taking advantage of your existing BGP-capable routers. Configuration only takes minutes.
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Benefit from industry-leading real time blocklists. These DNSBLs easily plug into your existing email infrastructure to block spam and other email threats.
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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.
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Spam (SBL), Policy (PBL), Exploits (XBL) and Auth (AuthBL) blocklists allow you to filter email from IPs associated with spam, botnets, and other threats.
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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 20 Jan 2021
German email provider, freenet, bring spam management in-house to increase control, flexibility and ultimately protection using Spamhaus' IP blocklists.
freenet, one of Germany’s major free email providers, supports customers across Austria, Switzerland and Germany, with around 4 million active users. Beyond email, freenet also deals in telecommunications and web content.
In 2015, freenet, like so many, had a complete anti-spam service through an external provider. While this offered a simple solution, it meant their spam management was behind closed doors, with little transparency to adapt the approach to their business’ needs.
The team found themselves asking, ‘why do we accept some messages and reject others’ and ‘what is the implication of this to our service and protection of customers?’.
This lack of control and flexibility motivated the team to manage their own spam infrastructure, to appropriately protect their customers from malicious activity, without reliance on decisions made independently of their business.
Bringing spam management in-house meant building their own approach from the ground up. Most importantly, it needed to be multi-layered and dynamic. At the edge would be IP-based DNS blocklists (DNSBLs), well known for their ability to filter the vast majority of junk email at the gateway.
The freenet team chose Spamhaus’ blocklists as their reputation data of choice, evaluating them as the “gold standard”. Through Spamhaus’ partner, Security Zones, the DNSBLs were purchased and easily implemented. The data provided was in standard format with a straightforward interface to load in.
Using IP blocklists which list over 10 million bad or suspect IPs, as their first line of defense at SMTP connect, freenet’s processing and storage requirements for content scanning are significantly reduced.
Lutz Harder from the freenet team shared that “[Spamhaus’] information is reliable, readily available and has proven to be a valuable asset allowing us to keep the cost for subsequent, more resource-intensive and time-consuming spam scanning at a much lower level.”
Moving to an in-house approach for spam management has also afforded freenet with flexibility around what mail they do or don’t accept, increased control of best practices and issue management, in addition to being responsible for their data’s privacy.
If you too are interested in other benefits to running your own email server, we list 6 advantages here.
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.
11 November 2020
Here are 11 ways to help email administrators make running their own email infrastructure a success.
6 October 2020
Data Query Service enables email provider, Universo Online (UOL) to protect millions of users from spam and other malicious email threats while freeing-up 20% of the team's time resources.
29 September 2020
Grasp the specifics relating to email source code, so you can apply IP and domain threat intelligence to the right place in your email filtering process.