Message header spam filtering

Details Message header spam filtering Message header spam filtering

2005-07-05

2009-06-02

Jaroenchonwanit, Bunjob (Department: 2456)

Electrical computers and digital processing systems: multicomput

Computer-to-computer data routing

C709S206000, C709S207000, C709S235000

Reexamination Certificate

active

07543076

ABSTRACT:
Message header spam filtering is described. In an embodiment, a message is received that includes header entries arranged in an ordered sequence which indicates a path by which the message was communicated. The header entries are parsed to categorize each header entry as a header type where the header types are listed in the ordered sequence. A quantity of each different header type is determined, and a determination is made as to whether the message is likely a spam message based at least in part on the quantity corresponding to a particular header type. In another embodiment, a numeric representation of the ordered sequence is created where the numeric representation includes unique integers assigned to each different header type. A determination is made as to whether the message is likely a spam message based at least in part on the numeric representation of the ordered sequence of header types.

REFERENCES:
patent: 5394394 (1995-02-01), Crowther et al.
patent: 5778002 (1998-07-01), Werle
patent: 2004/0068542 (2004-04-01), Lalonde et al.
patent: 2004/0260776 (2004-12-01), Starbuck et al.
patent: 2008/0159585 (2008-07-01), True et al.

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