Welcome to SpamRATS!

Not another infected PC or BotNet sending me spam... Well, maybe if you blocked the RATS at the SMTP level of your server, this would not be a problem. We have several lists of IP Addresses that have all the indicators of being RATS, and you can use them just like any of your favourite RBLs.

Subscription Info

Subscription is FREE for MOST people.

(However if you are a large email provider (e.g. > 5000 mailboxes) or you are selling/providing commercial spam protection you should be contributing to this effort. We do reserve the right to refuse access without a subscription for those types of companies. For subscription information and costs, please visit our Subscription page for more information.)

Other AntiSpam Tools

Dynamic Regex - Dynamic Regular Expression Testing is part of our suite of tools, used to identify address spaces that are not meant to be mail servers.

MIPSpace - MIPSpace is a list of IP Addresses associated with known commercial marketing companies.


RATS-Dyna - Probable PC or home connection infected with a Trojan, Bot, or Emailer Program


RATS-NoPtr - An IP Address which has no reverse DNS, and probably the home of a SpamBot


RATS-Spam - An IP Address that has been shown to be abusive (Use at your own risk)


RATS-Auth - An IP Address that has been shown to be used in an AUTH Attack