What is BlockedServers?
Still have a question, spotted an error, or have a better explanation or a source we should cite?
rbl.blockedservers.com, netscan.rbl.blockedservers.com and spam.rbl.blockedservers.com check IPs.
What the operator says
"aggregates threat intelligence data from multiple sources and community submissions" BlockedServers, Terms, read 1 Nov 2026.
What it really measures
Attacks and abuse seen by its sensor network and reported by others. It is free, and its own terms say the data may be incomplete, outdated or inaccurate.
How to get off it
The site has a lookup and a contact form. It does not spell out a removal route, so tell us the IP on the SOS Hotline and we will look with you.
Not sure what this means for you? Ask a person on our free SOS Hotline. Tell us the list and the IP or domain, and we reply within 48 to 72 hours.
The most useful email questions, once a month
One email a month. New questions worth reading, real deliverability changes (Gmail and Outlook updates, etc.), and any tool or report that landed since the last issue. No fluff, no upsell.
Contributors
Who worked on this answer
Every name links to their profile. Every company links to their site. Real people, real accountability.
