Spamhaus

Spamhaus is an organization that works to identify and block malicious internet activity related to spam, malware, and cyber threats. They maintain a publicly accessible database of IP addresses and domains known for sending spam or engaging in harmful online behavior. Internet service providers and security companies use Spamhaus data to filter out unwanted or dangerous emails and prevent cyberattacks, helping keep online communications safer and more reliable. Essentially, Spamhaus acts as a watchdog, helping to filter out malicious content before it reaches users.