MXRBL is a DNSRBL containing IPs/ranges known directly to be spammers that are strangely not listed at all of the most common RBLs. Our aim is to be fair and not operate with a god complex, unlike so many blacklists out there.

To use this blacklist, direct your DNS queries to If you are not familiar with the accepted method, reverse the IP address and add "" at the end. Example: becomes

Click here to check if an IP is listed on our blacklist.