
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.
RATS-NoPtr - 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. They are also known to have no reverse DNS, a technique often used by bots and spammers. Email servers should always have reverse DNS entries.
RATS-Spam - This is a list of IP Addresses that do not conform to more commonly known threats. This is usually because of compromised servers, hosts, or open relays. However, since there is little accompanying data this list could have false-positives, so we suggest that it only is used if you support a more aggressive stance.