Electrical computers and digital processing systems: multicomput – Computer conferencing – Demand based messaging
Reexamination Certificate
2004-04-02
2010-12-21
Nguyen, Dustin (Department: 2454)
Electrical computers and digital processing systems: multicomput
Computer conferencing
Demand based messaging
C726S002000, C726S022000
Reexamination Certificate
active
07856477
ABSTRACT:
The invention is directed to a system and method for determining if a “spam” message is originating from a messaging account by challenging a particular client's outbound email usage with a test that requires verification of content that is easily understood by a human being, not an automated computer program such as those used by “spammers.” If a limit on the number of recipients for outbound messages has been exceeded, a test is presented the next time a client attempts to send a message. The client must successfully answer the test within a relatively short period of time or else the ability to send messages will be disabled. Once disabled, the client can reinstate the ability to send messages by contacting a representative of the message system out of band, e.g., a telephone call to confirm legitimate outbound email use.
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Fenkel Len
Libbey Miles
Yoshimoto Steven Kenichi
Zhu Jing
Frommer & Lawrence & Haug LLP
Nguyen Dustin
Wiegand Jamie L.
Yahoo ! Inc.
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