Invaluement is a combination of 3 DNSBLs: InvaluementURI, InvaluementSIP and InvaluementSIP/24. The data stored in these lists are used by commercial spam filters like Mimecast Email Security.
InvaluementURI lists both domains names and IP addresses which are found within clickable links in the body of spam emails. InvaluementSIP lists IP addresses which either only send spam or which emit an extremely high percentage of spam. InvaluementSIP/24 blacklists spammers’ IP ranges or subnets where patterns of spam-sending from those blocks have been detected.