Method and system for selectively blocking delivery of bulk...

Details Method and system for selectively blocking delivery of bulk... Method and system for selectively blocking delivery of bulk...

2007-03-20

2007-03-20

Vu, Viet D. (Department: 2154)

Electrical computers and digital processing systems: multicomput

Computer conferencing

Demand based messaging

C709S225000, C709S229000, C709S237000

Reexamination Certificate

active

10407586

ABSTRACT:
The origin address of an e-mail message is validated to enable blocking of e-mail from spam e-mail sources, by preparing, in response to the receipt of a predetermined e-mail message from an unverified source address, a data key encoding information reflective of the predetermined e-mail message. This message, including the data key, is then issued to the unverified source address. The computer system then operates to detect whether a response e-mail message, responsive to the challenge e-mail message, is received and whether the response e-mail message includes a response key encoding predetermined information reflective of a predetermined aspect of the challenge e-mail message. The unverified source address may be recorded in a verified source address list. Thus, when an e-mail message is received, the computer may operate to accept receipt of a predetermined e-mail message on condition that the source address of the predetermined e-mail message is recorded in the verified source address list and alternatively on condition that the predetermined e-mail message includes the response key.

REFERENCES:
patent: 5815665 (1998-09-01), Teper et al.
patent: 6195698 (2001-02-01), Lillibridge et al.
patent: 6199102 (2001-03-01), Cobb

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