Origination/destination features and lists for spam prevention

A method that facilitates extracting data in connection with spam processing, comprising:

• receiving a message;
• extracting a set of features associated with an origination of the message or part thereof and/or information that enables an intended recipient to contact, respond or receive in connection with the message, wherein the set of features comprises at least a portion of an IP address;
• wherein extracting at least a portion of the IP address comprises performing at least one of consulting a block ID directory to determine at least one block ID corresponding to the IP address such that the block ID is extracted as an additional feature or extracting each of at least a first 1 bit up to a first 31 bits from the IP address;
• and
• employing a subset of the extracted features in connection with building a filter.

A system that facilitates extracting data in connection with spam processing, comprising:

• a means for receiving a message;
• a means for extracting a set of features associated with an origination of the message or part thereof and/or information that enables an intended recipient to contact, respond or receive in connection with the message, wherein the set of features comprises a host name and a domain name;
• and
• a means for employing a subset of the extracted features in connection with building a filter.