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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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.
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Discover a wide range of blog posts, case studies and reports.
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 The Spamhaus Team on 27 Jul 2022
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, deliverability experts from Emarsys, Twilio, and Validity, share the Email Software Provider’s (ESP) perspective on who is responsible for achieving good, consistent deliverability; is it the ESP or the sender? Spoiler – it’s both, but in very different ways…
Before we get cracking with the juicy stuff, let’s introduce this mighty trio who, with around 50 years of experience between them, have provided us with so much insight that we’ve had enough content to create three blog posts!
Between Kate, Kiersti, and Steve, we have a fountain of knowledge; all are passionate about email marketing compliance, delivery optimization, and ensuring that senders know, understand, and adopt best practices to conserve this much-valued communication tool. So, let’s dive in!
“Good deliverability is a partnership between the ESP and the sender,” comments Kiersti. “The ESP has a responsibility to set the sender up for success,” shares Steve, but “It’s a sender’s job to follow established best practices to maintain a good sender reputation” – Kate.
For ESPs, the focus is more on compliance and product. For senders, it’s about good data management and sharing engaging, valued content. Let’s dig a little deeper into this, kicking off with how ESPs should affect deliverability:
“Responsibility lies with the ESP to monitor the ecosystem in which you’re sending email,” explains Kate. “There needs to be active compliance monitoring to ensure bad actors are not allowed on the network or are quickly removed,” noted Kiersti. Particularly from a senders’ perspective, this is critical, because where IP space is shared, “negative (and positive) actions of others can impact your deliverability” – Kate. Network maintenance and good IP pooling are critical for effective deliverability and can only be done by the ESP.
When building the tools to enable sender success, the ESP should appreciate that “A sender will often follow the path of least resistance, so the ESP can influence the sender by making it easier to follow good practices in account setup and campaign creation,” shared Steve. He continued, “the ESP can make it easy or difficult to avoid issues, and choose how to highlight issues, their causes, and how to resolve them to help senders improve deliverability.
“Email receivers make changes all the time, so an ESP must be nimble to respond to those changes and optimize sending accordingly,” shared Kiersti. B2B receivers, for example, “are often trying to protect their networks from phishing and fraud and can be stricter with how email is sent and in what volume.” The platform must be able to adapt to maintain good sending practices that keep pace with changing audience behaviors.
So the ESP has a lot of influence. But ultimately, as Steve details, “it’s the sender who has collected the data, created the campaign content, selected the recipients, and hit ‘send’.” So it’s the sender who has the definitive responsibility to land their emails in a positive, engaging way. But there’s an important distinction to note here that Kiersti highlights…
When we speak of deliverability, we must acknowledge the distinction between email delivery and inbox delivery. “When an email is delivered, it is handed off to a different network, and that network can deliver mail to the inbox, the spam folder, or just drop the mail, so it’s not received at all.” Kiersti believes that “the reputation of the ESP will generally get an email delivered to the receiving network… unless the sender is truly a bad actor”.
But to achieve inbox placement, that lies with the sender. “The sender needs to maintain an engaging relationship with the recipient so that the mail is wanted and receives strong, ongoing engagement. And when engagement starts to wane, the sender needs to be able to identify that and work to re-engage, reduce or stop sending to that person altogether.”
As you have the ultimate responsibility to achieve inbox placement, ensure your database contains only email addresses from people who explicitly consented to receive your email. Be proactive in managing your database. Be consistent in your sending practices and deliver only what is expected. Find more on this here.
And pick your ESP wisely. They have a lot of influence on your deliverability, even if you hold the ace card. Make sure you look for a reputable ESP that:
Next up, you can read about the risks and opportunities when considering a move to a new ESP. Find it here.
27 July 2022
Email senders - take note: in this blog, the deliverability experts from Emarsys, Twilio, and Validity share their top 5 tips for you to achieve consistent email deliverability. You're welcome!
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?
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.