1
Daniel Alex Aronson, Sunil Paul, Kirpal Singh Khalsa, Timothy Milan Pozar: Method and apparatus for filtering e-mail. Brightmail Incorporated, Blakely Sokoloff Taylor & Zafman, November 25, 2003: US06654787 (476 worldwide citation)

A server is disclosed for filtering e-mail messages. The server receives requests to retrieve e-mail messages on behalf of a client and then retrieves e-mail messages from a mail server on behalf of the client. The server then filters the e-mail messages based on one or more rules and transfers the ...


2
Seifert Ralf: Method and apparatus for filtering e-mail. Seifert Ralf, SELDON Robert A, April 15, 2004: WO/2004/032439 (1 worldwide citation)

This invention relates to a method and system for allowing electronic mail users to control the acceptance and transmission of electronically mailed messages over a communications network such as the Internet by permitting the intended recipient (and/or a system administrator) to define what is auth ...


3
Daniel Alex Aronson, Sunil Paul, Kirpal Singh Khalsa, Timothy Milan Pozar, Art Medlar: Method and apparatus for filtering E-mail. Symantec Corporation, Meyertons Hood Kivlin Kowert & Goetzel P C, November 16, 2010: USRE041940

A server is disclosed for filtering e-mail messages. The server receives requests to retrieve e-mail messages on behalf of a client and then retrieves e-mail messages from a mail server on behalf of the client. The server then filters the e-mail messages based on one or more rules and transfers the ...


4
Michael R Andrews, Gregory P Kochanski, Daniel Philip Lopresti, Chi Lin Shih: Method and apparatus for filtering e-mail infected with a previously unidentified computer virus. Docket Administrator, October 30, 2003: US20030204569-A1

E-mail which may be infected by a computer virus is advantageously filtered by incorporating a “Reverse Turing Test” to verify that the source of a potentially infected e-mail is human and not a machine, and that the message was intentionally transmitted by the apparent sender. Such a test may, for ...