Openwave Systems Inc.

Unwired Planet, LLC

Mark H Granoff

Samuel G Silberman

Bruce L Brown, Jr

Robert M Fleischman

Michael S Zraly

Rajesh P Chaube

According to a first embodiment of the invention, if an e-mail sender attempts to make too many connections within a predetermined period of time, the excess connections are automatically rejected. According to a second embodiment of the invention, an agreement is established between an e-mail sender and an e-mail recipient that states when the sender may send e-mail messages to the recipient. According to a third embodiment of the invention, trend data reflecting an amount of e-mail sent by a sender is collected. The trend data can be used to establish a rate limit for the sender. According to a fourth embodiment of the invention, separate rate limits are established for authenticated and unauthenticated mail from addresses. According to a fifth embodiment of the invention, a sender may have a rate at which their e-mail is transmitted reduced if they exceed predetermined rate limits.

System for managing e-mail traffic

A classifier is implemented to determine the number of message transfer agents (MTAs) through which an email message has traveled. If the number of MTAs through which the email message has traveled is below a predetermined threshold and the email message is not otherwise authenticated, the classifier will designate the email message as abusive.

Method and apparatus for detecting abusive email based on number of hops

Method and system for detecting abusive email based on number of hops

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Framingham, MA, United States of America

Mark H Granoff