The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2010
Filed:
May. 23, 2005
Gurujiwan Khalsa, Berkeley, CA (US);
Gurujiwan Khalsa, Berkeley, CA (US);
Symantec Corporation, Mountain View, CA (US);
Abstract
A malicious e-mail manager provides protection from malicious e-mail attacks. A malicious e-mail manager examines an e-mail stream, and identifies suspicious e-mail messages therein. The malicious e-mail manager inverts responses to addresses from which identified suspicious e-mail originated. Where the target address of a suspicious e-mail message points to an existing recipient, the malicious e-mail manager returns an error code to the originating address indicating that the recipient does not exist. On the other hand, where the target address of a suspicious e-mail message points to a non-existent recipient, the malicious email manager returns a success code to the originating address, indicating that the e-mail message was delivered. Thus, senders of malicious e-mail believe that existing users are non-existent and vice versa. E-mail from legitimate senders is handled normally.