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.
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.
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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 27 Jul 2022
In this final blog post, with contributions from the deliverability experts at Emarsys, Twilio, and Validity, the Email Software Providers (ESP) share their most valuable advice to help senders achieve consistent inbox placement. From how to take ownership of issues to re-engagement techniques. Keep reading for the good stuff…
With over 50 years of deliverability experience between Kate, Kiersti, and Steve, you are not going to find a group of specialists more perfectly poised to impart sound deliverability knowledge! What follows are their most practical nuggets of advice that should help you get your email delivered consistently:
Achieving deliverability is a journey. And it’s not a linear one. Just because you’ve nailed it right now doesn’t mean that’ll be true in 6 months, and vice versa. It takes constant monitoring and adjusting – not least because consumer expectations, legal standards, industry standards, and email filtering effectiveness are getting tougher. Senders need to stay vigilant to keep up.
So if you start encountering issues, know you aren’t the only one. But as Steve puts it, “don’t use ‘but I haven’t changed anything’ as an excuse. If nothing has changed, that could be exactly why delivery problems suddenly start appearing.” Be proactive; nurture your lists and recipients with the care you’d expect.
“Whether you’re sending small or huge volumes of mail, a sender needs to remember that there is a person at the end of the email address” states Kiersti. That person expects:
You might think that giving them further information is helpful – it’s not your call to make. Give your recipients what they’ve signed up for, no more, no less. “This truly is a relationship being built, and the person behind the email address is deserving of respect” explains Kiersti.
If an email is unexpected, it’s much more likely to end up in the spam folder. Get it right from the beginning, starting with the data capture process. Steve imparts “set clear expectations, ideally providing choices around content, and make sure the data capture processes are secured against abuse.”
If you are changing your email program, changing the content slightly, or updating the frequency, communicate that to your recipients.
Similarly, as Kiersti describes, “if you are changing domains, that should be advertised in advance, so mail from the new domains is expected, making it more likely to receive engagement.”
So save your surprises for loved ones – and keep your email predictable.
Reaching your subscribers isn’t as simple as hitting ‘send.’ Validity research found that almost 20% of emails didn’t reach the inbox last year!
“Senders need to be more proactive about looking beyond surface-level metrics to know what’s really going on with their email performance. Even if 97% of your emails were delivered, these emails might have landed primarily in the spam folder,” explains Kate, who goes on to add “That’s why we recommend that senders keep a close eye on inbox placement rate—the percentage of mail that reached subscribers’ inboxes instead of being blocked or labeled as spam.”
Echoing the importance of tracking, Steve says “Don’t just monitor positive metrics: monitor risk factors, negative metrics, and the likely causes of delivery issues.” So beyond open rates, click-through rates, and conversion rates, keep an eye on bounce rates, unsubscribes, and spam complaints. Steve also highlighted monitoring “the number of contacts not interacting with campaigns, because lowering the ‘ignore rate’ helps focus attention on data quality and campaign effectiveness.”
The final bit of advice: “Review when and how often inactive customers and previous purchasers return. This will help you create a meaningful re-engagement program and give you the data needed to justify suppression and removal of long-term inactive contacts.” A great tip from Steve!
“The ESP remains an important tool for a sender, but consent and expectation setting happens before a sender even brings that email address into an ESP” – Kiersti.
Senders, you have the ultimate responsibility to deliver. So keep on top of your sign-up process, maintain your data quality, and keep the value of your content consistent. For more on sending best practices, see our eBook.
27 July 2022
Deliverability experts from Emarsys, Twilio and Validity share their insight into the opportunities and challenges senders should consider when changing email provider. Hint - you need to build your reputation from scratch, so how can an email filter decide if your email is genuine or attempted abuse?
As part of our Deliverability 101 series, we're inviting experts from across the email-sending community to share their pearls of wisdom. For this blog post, we get the insight from Emarsys, Twilio, and Validity on who holds responsibility for deliverability.
12 July 2022
Email authentication has always had its challenges but with the advent of BIMI, users and brands alike will be better protected when engaging with email. Fredrik Poller from Halon brings you up-to-speed on the latest authentication method.