Blacklist in detail: pbl.spamhaus.org

SPAMHAUS - The Policy Block List IPv4

The Spamhaus PBL is a DNSBL database of end-user IP address ranges which should not be delivering unauthenticated SMTP email to any Internet mail server except those provided for specifically by an ISP for that customer's use. The PBL helps networks enforce their Acceptable Use Policy for dynamic and non-MTA customer IP ranges.

PBL IP address ranges are added and maintained by each network participating in the PBL project, working in conjunction with the Spamhaus PBL team, to help apply their outbound email policies.

Example Response Message
http://www.spamhaus.org/query/bl?ip=XXX.XXX.XXX.XXX
Website
http://www.spamhaus.org/pbl/
Removal
http://www.spamhaus.org/lookup/
Last Accessed
2017-12-14 05:00 (UTC) 
Last Checked
When we last checked 33 minutes ago it was working.
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History for pbl.spamhaus.org (Last 10 Days)

We keep some statistics on blacklists. Below is the graph for pbl.spamhaus.org. 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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