Blacklist in detail:

Spam Rats! RATS-Dyna IPv4

RATS-Dyna - RATS-Dyna 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. They are also known to conform to a naming convention that is indicative of a home connection or dynamic address space.

You can ask for removal if you complaint to their rules:

  • Your reverse DNS must not be your ISP's generic name.
  • You must have a reverse DNS record (PTR).
Example Response Message
SPAMRATS IP Addresses See:
Last Accessed
2018-12-18 10:50 (UTC) 
Last Checked
When we last checked 1 hour 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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