DNS

Query the legacy DNSBLs via Korea Telecom? Move to Spamhaus Technology’s free Data Query Service

If you're using the free legacy DNS Blocklists (DNSBLs) through the Public Mirrors while running on Korea Telecom’s infrastructure, you'll need to make a few small adjustments to your email setup. These changes are simple to apply, but if you don’t take action, you risk having some - or even all - of your email blocked after September 17th, 2025!

Query the legacy DNSBLs via Microsoft? Move to Spamhaus Technology’s free Data Query Service

If you're using the free legacy DNS Blocklists (DNSBLs) through the Public Mirrors while running on Microsoft’s infrastructure, you'll need to make a few small adjustments to your email setup. These changes are simple to apply, but if you don’t take action, you risk having some - or even all - of your email blocked after April 9, 2025!

If you query the legacy DNSBLs via Hetzner move to Spamhaus Technology’s free Data Query Service

Currently accessing the free legacy DNS Blocklists (DNSBLs) via the Public Mirrors, and using Hetzner's network? You'll need to make some minor changes to your email infrastructure. The changes are simple to implement, but if you fail to do so, you could find that at some point post-February 19th 2025, all or none of your email is blocked!

Avoiding Blocklistings: Part 3 - Take Matters into Your Own Hands to Protect Your Senders

Welcome back to the final instalment of our three-part series, where Lauren Meyer, CMO at SocketLabs, shares her top strategies for avoiding block listings. In Part 3, Lauren explores the proactive steps YOU can take to help senders avoid blocklistings.

Avoiding Blocklistings: Part 2 - Monitor and Educate Your Customers

Welcome back to Part 2 of our three-part series, where Lauren Meyer, CMO at SocketLabs, shares her top strategies for avoiding block listings. In Part 2, Lauren dives into how you can proactively monitor activity and educate your customers to become top senders!

Avoiding Blocklistings: Part 1 - Set Yourself AND Your Senders Up for Success

Building on the success of our popular LinkedIn Live with Melinda Plemel and Lauren Meyer, CMO at SocketLabs, Lauren has generously shared her top strategies for avoiding block listings in this three-part blog series.

The secret to secure DNS? It’s all in the policies

Following our recent investigations into the dangers of subdomain hijacking, we caught up with Prudence Malinki, Head of Industry Relations at Markmonitor, for some wise words of advice on the role policy can play in ensuring your DNS is secure.

10 DNS best practices to keep your Domain Reputation in check

Poor DNS hygiene can leave your organization vulnerable to threats like subDoMailing, DNS spoofing, domain hijacking and other threats. In addition to putting domain security at risk, these vulnerabilities can have long-term effects on domain reputation. Here are ten DNS best practices businesses can implement to protect their domains and entire business.

Spamhaus Deliverability Live (Ep9) - Five essential steps for every ESP to avoid blocklists

It's time for the Spamhaus Deliverability Live ep9: "Blockbusters: Five essential steps for every ESP to avoid blocklists." Lauren and Mel share all in this 15-minute deliverability fix, packed with expert insights to keep your customers on track and stay out of blocklists!

Markmonitor webinar | League Table Talk: Ranking ccTLDs on DNS Abuse

In this Markmonitor webinar, Spamhaus' Carel Bitter, joins Georgia Osborn, Senior Research Analyst at the DNS Research Federation, and Chris Niemi, Manager of Strategic Initiatives at Markmonitor, to discuss ccTLDs in the larger context of DNS Abuse.

A misuse of Spamhaus blocklists: PART 2 - How to limit outbound spam

If you’ve skipped the first part of this series, we strongly recommend you go and read this blog first (link below), to understand the misuse of Spamhaus blocklists to block outbound mail. However, if you provide a mail service and want to learn specifically how to limit your outbound spam, read on.

A misuse of Spamhaus blocklists: PART 1 - blocking outbound email

One issue our folks handling tickets submitted by blocked users experience are messages like: Help! My IP is listed by Spamhaus and now I can’t send emails! My provider is rejecting all my emails! You may be asking “Is this not exactly what is supposed to happen in case of a listing?”. Surprising, the answer is “No, it is not!” This is a misuse of our blocklists

If you query the legacy DNSBLs via GoDaddy move to Spamhaus Technology’s free Data Query Service

Currently accessing the free legacy DNS Blocklists (DNSBLs) via the Public Mirrors, and using GoDaddy's network? You'll need to make some minor changes to your email infrastructure. The changes are simple to implement, but if you fail to do so, you could find that at some point post-September 26th 2024, all or none of your email is blocked!

Dangling DNS and the dangers of subdomain hijacking

DNS attacks are becoming increasingly prevalent, with 90% of organizations experiencing them, as per the IDC Threat Intelligence Report 2023. Due to its critical function, DNS is a frequent target for cybercrimes, including DDOS attacks, DNS spoofing and DNS hijacking. However, a lesser-known but significant threat is the dangling DNS record - read on to learn more.

The Policy Blocklist: what is it, and why should you be on it?

It’s not always "bad" to be listed on one of Spamhaus' DNS Blocklists. Despite what you may think, there is one list you may want to be on: the Policy Blocklist (PBL). Want to know more? Let's dive into the PBL, what it is, how it works, and how it affects users. Whether you're an Internet Service Provider (ISP) or an end user, find out everything you need to know.