Blacklist in detail: noptr.spamrats.com

Spam Rats! RATS-NoPtr! IPv4

RATS-NoPtr is a collection of IP Addresses that have been found sending an abusive amount of connections, or trying too many invalid users at ISP and Telco's mail servers, and are also known to have no reverse DNS, a technique often used by bots and spammers. Email servers should always have reverse DNS entries.

Example Response Message
SPAMRATS IP Addresses See: http://www.spamrats.com/bl?XXX.XXX.XXX.XXX
Website
http://www.spamrats.com/rats-noptr.php
Removal
http://www.spamrats.com/removal.php
Last Accessed
2017-12-11 07:45 (UTC) 
Last Checked
When we last checked 44 minutes ago it was working.
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History for noptr.spamrats.com (Last 10 Days)

We keep some statistics on blacklists. Below is the graph for noptr.spamrats.com. 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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