To help you understand why an IP is listed in our DNSbl database, we have established the following policies:
Open Relay (Response: 127.0.0.2)
This IP address is listed because it is an open SMTP relay - either a single relay, or a multi-stage relay. An open SMTP relay means that a third party can send e-mail through the server on that IP address without authorization (to spam, for example).
Open Proxy (Response: 127.0.0.3)