Invaluement is a commercial blocklist aimed at snowshoe spam, botnets, and ESPs that don't police their customers. Mail filters that subscribe to it use it to reject or score mail.
Invaluement's old public hostnames answer 'listed' for every IP when queried by a resolver it hasn't authorized. If a free lookup tool shows every address you try as listed on Invaluement, that's why, and it doesn't mean you're actually on it.
Invaluement runs three lists: one for IPs that send almost nothing but spam, one for whole IP ranges showing snowshoe patterns, and one for domains found in spam links. Normal senders can get a short listing when a system is compromised.
Fix the cause, then use the Delist Requests page on Invaluement's site and follow its instructions.
Generator Labs checks your IPs and domains against Invaluement and hundreds of other blacklists and alerts you by email, Slack, SMS, or webhook when a real listing appears. Free for your first host.
Its old public hostnames answer that way for unauthorized resolvers. Only subscribers querying their private hostname get real answers.
No. It's a paid subscription with a free trial.
Through the Delist Requests page on invaluement.com.