Spamhaus’ take on Cold Emailing…AKA spam
Cold emailing, as it’s practiced today, is spam — for inboxes, businesses, and the internet. It’s a thriving industry, but one raising concerns in the email community. In this article we define ...
Stronger through sharing: PhishFort and Spamhaus working together
PhishFort - an anti-phishing specialist - has collaborated with Spamhaus to share verified threat data from their phishing detection systems. In this guest blog, Lucas Sierra, CEO of PhishFort, explains how making ...
Botnets disrupted worldwide…Operation Endgame is BACK!
Operation Endgame, “Season 2”, is officially announced as of Friday, May 23rd, 2025. International law enforcement agencies and their partners have once again joined forces to disrupt and dismantle botnet infrastructure and ...
Mail relays – Part 2 | Problems with forwarded mail?
Forwarded mail can be more trouble than it’s worth - especially when it’s done without checks, validation, or spam filtering. Typos, unintended recipients, and forged senders can quickly snowball into blocklistings and ...
Mail relays – Part 1 | Authenticate your outgoing mail!
Email authentication used to be something only big players worried about. Not anymore. While small senders may not feel the heat yet, it’s only a matter of time before it reaches them ...
Abuse takes its “toll” on .top: But who is paying the price?
Despite ICANN issuing a formal notice to .top citing a breach of contract for failing to address DNS abuse, the situation has not improved. Over the last six months, abuse of .top ...
Domain Reputation Update Oct 2024 – Mar 2025
New domains are up 7.39%, with 2.9 million malicious domains detected. Chinese gambling sites dominate the Top 20 TLDs, while .top remains a hotspot for abuse - this time with a spike ...
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 ...
How I’m fighting cybercrime with Spamhaus (and how you can too!)
Meet Jeroen Gui - student, founder of JustGuard, and a top contributor to Spamhaus' Threat Intel Community Portal. Passionate about making the internet a safer place, Jeroen submits thousands of malicious domains, ...
Networks hosting botnet C&Cs: Same players, same problems
With every Botnet Threat Update we publish, the same networks consistently appear in the Top 20 for hosting botnet command and control (C&C) servers. But why does this keep happening? In this ...
