Blacklist in detail: IPv4 lists IP addresses that they have not received any legit email from and is already listed by one of the other RBLs.

To get removed, the IP should first be removed from other lists then it can be removed from the website. But if the removed IP is seen SPAMming again it will be listed for 30 more days. To get removed you must send an email to a specific address with a specific subject generated by the lists website from the IP you are trying to remove.

Example Response Message
IP XXX.XXX.XXX.XXX is sending More Information available at
Last Accessed
2020-12-03 07:00 (UTC) 
Last Checked
When we last checked 1 week ago it was working.
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History for (Last 10 Days)

We keep some statistics on blacklists. Below is the graph for We test blacklists by asking them to respond to known IP's that are blacklisted and known IP's that can't be blacklisted. Not every blacklist has such IP's, we test them with what is possible. We keep if we get any response or error messages and the response duration. Lower response times are better. These statistics may be useful for email server administrators to pick which blacklist to use.

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