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.
In depth information about the technical details and implementation of our products.
Posted by The Spamhaus Team on 11 Jan 2024
If you are currently accessing the Spamhaus Project's legacy DNS Blocklists (DNSBLs) via the Public Mirrors, and you’re using DigitalOcean infrastructure - you'll need to make some minor changes to your email infrastructure. The changes are easy to implement, but if you fail to do so, you could find that at some point post-February 14th 2024, all or none of your email is blocked!
To provide a clear signal to these users that these blocklists are not protecting their email, Spamhaus will return an error code; 127.255.255.254. If you haven’t set up your email servers to accept this error code, all emails could be rejected and bounced back to their sender.
To prevent any issues with your email stream, stop accessing Spamhaus’ free blocklists via the Public Mirrors and start accessing the blocklists via our free Data Query Service (DQS), which you can sign up for here.
Once you’ve verified your email address, you will get access to a “DQS key” to include in your configuration. These config changes take only minutes; see our technical docs for more detail.
DigitalOcean masks organizations’ queries to the Project’s Public Mirrors, so the team can’t attribute usage to individual entities. They have no way of establishing the number of queries a single organization is making.
To provide transparency, these free blocklists can be accessed via the free DQS.
If your MTA can’t correctly parse these error codes, serious issues can occur, including bouncing all emails back to their senders and your emails not being queried against the blocklists. Here’s how to properly configure your MTA to process these error codes, if you continue to use the Spamhaus Project’s DNSBLs.
The Spamhaus Project will slowly implement the error code across DigitalOcean’s IP space, commencing from Wednesday, February 14th, 2024.
Please don’t delay – take action now and move to the free DQS.
Additional information for Spamhaus Project’s DNSBLs users having issues due to error codes is detailed here.
Previous communications that were sent in relation to these changes can be found here:
Not a problem – reach out to us via Twitter @spamhaustech or our contact form, and we’ll try and answer any question you have or failing that we’ll pass it onto the Spamhaus Project for a response.
11 February 2021
The Spamhaus Project are introducing error codes to indicate when no data is being returned. If you're using these blocklists ensure you check your MTA configuration.
4 July 2018
If you're using the Spamhaus free public mirrors and Google's public DNS then it's likely your spam isn't being blocked. Here's what you need to do.