Global RBL Match: IP is on the xbl.spamhaus.org Blacklist
This rules detects that an IP address connecting to your server is listed on the xbl.spamhaus.org blacklist run by the SpamHaus project. They describe this RBL as:
"The Spamhaus Exploits Block List (XBL) is a realtime database of IP addresses of hijacked PCs infected by illegal 3rd party exploits, including open proxies (HTTP, socks, AnalogX, wingate, etc), worms/viruses with built-in spam engines, and other types of trojan-horse exploits."
There are no known False Positives for this, however if you believe this is a false positive, it is recommended that you report this to the spamhaus project. Atomicorp does not run this RBL. You can access their website here: