Blocklists & Reputation Databases

The "public wanted posters" of the email sea. This section is a guide to checking major blocklists (like Spamhaus) and reputation databases to see if your IP or domain has been publicly listed as a "known pirate.

20 questions in this topic

My IP/domain is blocklisted, what's the first step? How do I identify the cause of the blocklisting? How do I request removal from Spamhaus? How do I request removal from Spamcop? How do I request removal from Barracuda? What information do I need to provide for a delisting request? How long does delisting usually take? What if my delisting request is denied? What’s the difference between a DNSBL, RBL, and URI blocklist? How do blocklists differ in severity or reach? How do you check if your domain or IP is listed? What is Spamhaus and why is it so influential? What is SURBL and how does it differ from Spamhaus? What’s the difference between IP and domain listings? What causes blocklist listings (technical vs behavioral)? How to request delisting properly? What are delisting mistakes that make things worse? How can you prevent re-listing? How to document evidence for delisting requests? Can blocklists permanently damage reputation even after removal?

Questions about Blocklists & Reputation Databases