0Spam.com IP Blacklist Project
There are IP addresses in the 0Spam.com IP Blacklist.
The 0Spam.com IP Blacklist is a realtime database of known spammer DNS IP addresses and is maintained by a third-party using various spam traps and spam reporting services. Software developers and mail server administrators may configure their scripts or mail servers to automatically back-check if a suspected IP address is in our this database of known spammers. The script may be called in the following manner:
The script will then return a number between -1 and 7:
A score of -1 indicates that the IP was not found in the database.
A score of 0 indicates that there is a 90% chance that the computer at that IP address does not currently send spam.
A score of 1 or more indicates that the computer at that IP address has defiantly spammed in the past few weeks.
It is highly recommended that any mail server accepting mail from an IP with a score of more than 3 not accept the mail.