MESSAGE CHALLENGE RESPONSE
First Claim
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1. A method for registering an email sender for the purpose of sending an email message to an email recipient, the method comprising:
- receiving a message from an email sender; and
executing instructions stored in memory, the instructions being executed by a processor to;
evaluate an identity of the email sender of the received message, wherein the evaluation checks to see if the email sender is on a list of authorized senders that previously sent valid emails to the email recipient,generate a challenge message for the email senders that are not found on the list of authorized senders,transmit the generated challenge message to the email sender,receive a response to the transmitted challenge message from the email sender,process the received message based on the received response, wherein the processing includes generating a notification for the email recipient classifying the received email, andupdate the list of authorized senders based on the received response.
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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.
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12 Claims
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1. A method for registering an email sender for the purpose of sending an email message to an email recipient, the method comprising:
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receiving a message from an email sender; and executing instructions stored in memory, the instructions being executed by a processor to; evaluate an identity of the email sender of the received message, wherein the evaluation checks to see if the email sender is on a list of authorized senders that previously sent valid emails to the email recipient, generate a challenge message for the email senders that are not found on the list of authorized senders, transmit the generated challenge message to the email sender, receive a response to the transmitted challenge message from the email sender, process the received message based on the received response, wherein the processing includes generating a notification for the email recipient classifying the received email, and update the list of authorized senders based on the received response. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification