54.240.8.126 Listed at zen.spamhaus.org

Spamhaus is a project that monitors spam and other cyber threats like phishing, malware, and botnets. If an IP address is on the Spamhaus Block List (SBL), it means that Spamhaus believes it is a source of spam or other threats. Discover why the IP address was blacklisted. This could be due to spamming, malware hosting, or other factors. Then Resolve the issue that resulted in the blacklisting. This could imply tightening security, preventing spam emails, cleaning up malware, and so on. You can request removal from the blacklist once the problem has been resolved. This is usually done through Spamhaus' website. You must provide specifics about the steps you took to resolve the problem.