Product
Spamhaus ZEN
- First Reported
- Oct 23, 2026
- Latest Reported
- Oct 23, 2026
Reported Context (1)
- IPs that fail can be listed on the Combined Spam Sources (CSS) or Exploits (XBL) lists. Both are part of Spamhaus ZEN, which many receiving mail servers check on every incoming connection. Study: 28% of 494 Domains Sent Some Mail From IPs Failing Spamhaus DNS Checks
Vendors (2)
Products (1)
Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.