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.
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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.
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Posted by Sarah Miller on 30 Jun 2021
Spamhaus has released the extended CSS Blocklist (eCSS) and made it available via our API service. This provides users with additional insights relating to compromised and malicious IP addresses.
The name gives it away – it’s an API that’s easy to integrate with existing systems, which delivers enhanced IP reputation data. This metadata gives increased visibility and context to users, speeding up investigations and accelerating reporting relating to IP addresses.
Red Sift Open Cloud utilizes SIA to help their customers rapidly classify potential threats, enabling them to dramatically reduce the amount of time spent analyzing reports. Read more.
This dataset is specific to SMTP traffic, i.e., it only lists port-25 based detections. The focus is on spam and other low-reputation sources. Our researchers list IPs on this dataset if they observe any of the following behavior:
The eCSS contains between 300,000 – 1.5 million listings, with up to 285,000 new listings added every 24 hours. Not only can it be used by abuse desks for remediation, but, given its SMTP focus, senders can utilize it from a reputation perspective too. Additionally, receivers can use the CSS to take a deeper dive into the reasons behind a listing on the CSS blocklist.
A dataset called the extended eXploits blocklists (eXBL) is also included. This lists IP addresses belonging to any device showing signs of compromise and includes the Internet of Things (IoT) traffic. Listings on the eXBL result from:
This dataset on average contains 7.5 million listings, with up to 75,000 newly observed IPs added every 24 hours.
If you’d like to trial this data via SIA, you can sign up here. Alternatively, for those who would like an opportunity to experiment with our data over an extended period, sign up for our free Developer License, which gives six months of access to these datasets without any charge.
This API provides access to multiple datasets containing metadata relating to compromised IP addresses. These IP addresses may be exhibiting compromised behavior, including malware, worm, and trojan infections, and SMTP-specific traffic emitting spam, or cybercriminals are using them to control infected computers – botnet command & controllers.
The breadth of data available via an easily consumable API provides security developers with scores of opportunities.
25 January 2022
The breadth of reputation data available via the Spamhaus intelligence API is increasing - the extended Botnet Controller List is now included.
28 September 2021
An easy-to-exploit security vulnerability that allows remote code execution (RCE) on virtual machines where Open Management Infrastructure (OMI) is installed has been observed. Users need to take action.
23 March 2021
We're aware that it can take time to find the right use case and build the right application to meet its needs. So, we've created a license to give developers access to the data without the 30-day time limit attached to a trial. The developer license runs for six-month periods.