Abstract: Systems and methods for processing a message are provided. A message may be processed to generate a message summary by removing or replacing certain words, phrases, sentences, punctuation, and the like. Message signatures based upon the message summary may be generated and stored in a signature database, which may be used to identify and/or classify spam messages. Subsequently received messages may be classified by signature and processed based on classification.

Abstract: Detecting infectious messages comprises performing an individual characteristic analysis of a message to determine whether the message is suspicious, determining whether a similar message has been noted previously in the event that the message is determined to be suspicious, classifying the message according to its individual characteristics and its similarity to the noted message in the event that a similar message has been noted previously.

Abstract: Systems and methods for processing a message are provided. A message may be processed to generate a message summary by removing or replacing certain words, phrases, sentences, punctuation, and the like. Message signatures based upon the message summary may be generated and stored in a signature database, which may be used to identify and/or classify spam messages. Subsequently received messages may be classified by signature and processed based on classification.

Abstract: Detecting infectious messages comprises performing an individual characteristic analysis of a message to determine whether the message is suspicious, determining whether a similar message has been noted previously in the event that the message is determined to be suspicious, classifying the message according to its individual characteristics and its similarity to the noted message in the event that a similar message has been noted previously.

Abstract: Systems and methods for managing forwarded infectious messages are provided. Managing electronic message comprises receiving a message, forwarding the message, determining that the forwarded message is infectious after the message has been forwarded and preventing the infectious forwarded message from spreading.

Abstract: A system and method are disclosed for improving a statistical message classifier. A message may be tested with a machine classifier, wherein the machine classifier is capable of making a classification on the message. In the event the message is classifiable by the machine classifier, the statistical message classifier is updated according to the reliable classification made by the machine classifier. The message may also be tested with a first classifier. In the event that the message is not classifiable by the first classifier, it is tested with a second classifier, wherein the second classifier is capable of making a second classification. In the event that the message is classifiable by the second classifier, the statistical message classifier is updated according to the second classification.

Abstract: A technique for determining a boundary IP address is disclosed. The technique includes processing a header to extract candidate IP address, locating a gateway IP address, and selecting the boundary IP address based on the location of the gateway IP address.

Abstract: Systems and methods for processing a message are provided. A message may be processed to generate a message summary by removing or replacing certain words, phrases, sentences, punctuation, and the like. Message signatures based upon the message summary may be generated and stored in a signature database, which may be used to identify and/or classify spam messages. Subsequently received messages may be classified by signature and processed based on classification.

Abstract: A technique for determining a boundary IP address is disclosed. The technique includes processing a header to extract candidate IP address, locating a gateway IP address, and selecting the boundary IP address based on the location of the gateway IP address.

Abstract: A system and method are disclosed for routing a message through a plurality of test methods. The method includes: receiving a message; applying a first test method to the message; updating a state of the message based on the first test method; and determining a second test method to be applied to the message based on the state.

Abstract: A system and method are disclosed for routing a message through a plurality of test methods. The method includes: receiving a message; applying a first test method to the message; updating a state of the message based on the first test method; and determining a second test method to be applied to the message based on the state.

Abstract: Detecting infectious messages comprises performing an individual characteristic analysis of a message to determine whether the message is suspicious, determining whether a similar message has been noted previously in the event that the message is determined to be suspicious, classifying the message according to its individual characteristics and its similarity to the noted message in the event that a similar message has been noted previously.

Abstract: Detecting infectious messages comprises performing an individual characteristic analysis of a message to determine whether the message is suspicious, determining whether a similar message has been noted previously in the event that the message is determined to be suspicious, classifying the message according to its individual characteristics and its similarity to the noted message in the event that a similar message has been noted previously.

Abstract: A method of determining whether a guarded term is represented in a message comprises associating a portion of the message with the guarded term and evaluating a cost of the association. A method of generating a collection of guarded terms that represents an original term comprises generating a plurality of variations of the original term, evaluating similarity of each of the plurality of variations with respect to the original term and determining whether the similarity meets a predetermined criterion.

Abstract: A system and method are disclosed for improving a statistical message classifier. A message may be tested with a machine classifier, wherein the machine classifier is capable of making a classification on the message. In the event the message is classifiable by the machine classifier, the statistical message classifier is updated according to the reliable classification made by the machine classifier. The message may also be tested with a first classifier. In the event that the message is not classifiable by the first classifier, it is tested with a second classifier, wherein the second classifier is capable of making a second classification. In the event that the message is classifiable by the second classifier, the statistical message classifier is updated according to the second classification.

Abstract: A method of controlling distribution of content in a message sent by a message sender comprises receiving an indication from the message sender that the message is to be protected, identifying content in the message to be protected, adding the identified content to a database of protected content, and determining whether subsequently received content in a subsequently received message is associated with the identified content. A system for controlling distribution of content in a message sent by a message sender comprises a processor configured to receive an indication from the message sender that the message is to be protected, identify content in the message to be protected, add the identified content to a database of protected content, and determine whether subsequently received content in a subsequently received message is associated with the identified content.

Abstract: A method of controlling distribution of content in a message sent by a message sender comprises receiving an indication from the message sender that the message is to be protected, identifying content in the message to be protected, adding the identified content to a database of protected content, and determining whether subsequently received content in a subsequently received message is associated with the identified content. A system for controlling distribution of content in a message sent by a message sender comprises a processor configured to receive an indication from the message sender that the message is to be protected, identify content in the message to be protected, add the identified content to a database of protected content, and determine whether subsequently received content in a subsequently received message is associated with the identified content.

Abstract: Detecting infectious messages comprises performing an individual characteristic analysis of a message to determine whether the message is suspicious, determining whether a similar message has been noted previously in the event that the message is determined to be suspicious, classifying the message according to its individual characteristics and its similarity to the noted message in the event that a similar message has been noted previously.

Abstract: A system and method are disclosed for registering a email sender for the purpose of sending an email message to an email receiver including receiving a challenge message wherein the challenge message includes a machine answerable question; processing the challenge message to determine that it is a challenge message sent for the purpose of authorizing delivery of the email message; analyzing the question to determine a valid response to the challenge message; and sending the valid response that includes the answer wherein a nontrivial amount of resources are required to send the valid response.

Abstract: Systems and methods for processing a message are provided. A message may be processed to generate a message summary by removing or replacing certain words, phrases, sentences, punctuation, and the like. Message signatures based upon the message summary may be generated and stored in a signature database, which may be used to identify and/or classify spam messages. Subsequently received messages may be classified by signature and processed based on classification.