Electrical computers and digital processing systems: multicomput – Computer conferencing – Demand based messaging
Reexamination Certificate
2011-03-01
2011-03-01
Zhang, Shirley X (Department: 2444)
Electrical computers and digital processing systems: multicomput
Computer conferencing
Demand based messaging
C726S022000
Reexamination Certificate
active
07899866
ABSTRACT:
Email spam filtering is performed based on a sender reputation and message features. When an email message is received, a preliminary spam determination is made based, at least in part, on a combination of a reputation associated with the sender of the email message and one or more features of the email message. If the preliminary spam determination indicates that the message is spam, then a secondary spam determination is made based on one or more features of the received email message. If both the preliminary and secondary spam determinations indicate that the received email message is likely spam, then the message is treated as spam.
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Buckingham Jay T.
Goodman Joshua T.
Hulten Geoffrey J
Rounthwaite Robert L.
Lee & Hayes PLLC
Microsoft Corporation
Zhang Shirley X
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