Blacklist in detail: dnsbl.openresolvers.org

The Measurement Factory: Open Resolvers IPv4

This is not an actual SPAM DNSBL. This list contains IP's of open DNS resolvers. An open DNS resolver is a DNS that provides name resolution outside of its administrative domain.

According to the RBL website they check IP addresses by querying the IP's at most every three days.

Website
http://dns.measurement-factory.com/surveys/openresolvers.html
Removal
Unknown
Last Accessed
2017-10-18 14:00 (UTC) 
Last Checked
When we last checked 54 minutes ago it was working.
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History for dnsbl.openresolvers.org (Last 10 Days)

We keep some statistics on blacklists. Below is the graph for dnsbl.openresolvers.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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