Importance

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Abstract

A method and software product for detecting unsolicited emails, e.g. spam, involves altering the case of at least some symbols comprising an email user's email address according to a predetermined criteria prior to transmitting an email message. The altered case sequence of the email user's address is stored in a database. Subsequently, as email's are received in the email user's mailbox their intended recipient addresses are processed to determine if they include symbols whose case sequence, i.e. uppercase and lowercase, matches one of the sequences that was previously stored. If no match is found then the incoming email is treated as potentially constituting spam and is handled as such. Embodiments of the invention take advantage of a property of most Internet post office email servers being that they are generally case insensitive in respect of the symbols that make up an email address.

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First Claim