022.005

Blocklists & Reputation Databases

The "credit bureaus" and "patrols." This section identifies the key third-party services that track sender reputation, most importantly Spamhaus (the "world police") and Validity (owner of the "Sender Score").

14 questions in this topic

What are blocklists and why do they exist? Who operates the major blocklists? What is Spamhaus? What is Barracuda Reputation? What is Talos Intelligence? What’s the difference between IP and domain blocklists? What are URI (link-based) blocklists? How do blocklists detect spam? How do you get listed? How do you get delisted? What is a self-removal request? What are spamtrap networks? What is Return Path (Validity) reputation data? How do blocklists share intel across networks?