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Using our public mirrors? Check your return codes now. 2021-02-11 UTC
Back in late 2019, we advised of some new return codes for users of our public mirrors.... (>)

Update for Composite Blocklist (CBL) Users 2020-12-18 UTC
As of January 5th, 2021, the Composite Blocklist (CBL) is being retired. This data, however, is included in the eXploits Blocklist (XBL).... (>)

Spamhaus Botnet Threat Update: Q2-2020 2020-07-30 UTC
The pandemic certainly didn’t put the brakes on botnet operators in Q2 2020. After the welcome decrease in activity at the end of Q1, the research team tracked and listed a 29%* increase in the number of botnet Command & Controllers (C&Cs) this quarter. This increased activity is highlighted across most of our Top 20... (>)

Spamhaus Botnet Threat Update: Q1-2020 2020-04-21 UTC
In the past quarter, the number of botnet Command & Controllers (C&Cs) associated with fraudulent sign-ups, reduced by 57%.... (>)

It was the best of times, it was the worst of times 2020-04-07 UTC
Calamity always magnifies the light and darkness in people. We see countless... (>)

Bulletproof hosting – there’s a new kid in town 2019-12-19 UTC
Our researchers have uncovered a new breed of "bulletproof" hosting. Here's what you need to know...... (>)

Spamhaus DNSBL return codes: technical update 2019-09-30 UTC
A new set of DNSBL query error codes has been added to public Spamhaus DNSBL zones. While it will be quite uncommon for most Spamhaus users to encounter these codes, it is vitally important that software developers implement all return codes correctly.... (>)

Spamhaus' DBL as a Response Policy Zone (RPZ) 2011-06-10 UTC
All too frequently electronic security breaches result from some form of social engineering trick which entices a user to visit a harmful website by providing a clickable link (URL) with a specially-registered domain which ultimately leads to the user being defrauded or their machine being infected with malware. Once infected, criminals very quickly gain complete control of that user's... (>)

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