15. A system for processing e-mails, the system comprising: a processor; and a memory coupled to the processor, the memory configured to store a set of instructions which when executed by the processor configure the processor to: receive a plurality of e-mails obtained from an e-mail repository; store information representing each e-mail in the plurality of e-mails, stored information representing a given e-mail including at least one of content of the given e-mail and message attribute data of the given e-mail; for each e-mail in the plurality of e-mails, determine a set of noun phrases included in the e-mail based on stored information representing the e-mail, and generate a feature representation for the e-mail based on the determined set of noun phrases included in the e-mail, a feature representation for a given e-mail scoring selected noun phrases in a set of noun phrases determined to be included in the given e-mail; generate a set of topics based on the feature representation generated for each e-mail in the plurality of e-mails; and store each topic in the set of topics in association with at least some of the plurality of e-mails.
15. A system for processing e-mails, the system comprising: a processor; and a memory coupled to the processor, the memory configured to store a set of instructions which when executed by the processor configure the processor to: receive a plurality of e-mails obtained from an e-mail repository; store information representing each e-mail in the plurality of e-mails, stored information representing a given e-mail including at least one of content of the given e-mail and message attribute data of the given e-mail; for each e-mail in the plurality of e-mails, determine a set of noun phrases included in the e-mail based on stored information representing the e-mail, and generate a feature representation for the e-mail based on the determined set of noun phrases included in the e-mail, a feature representation for a given e-mail scoring selected noun phrases in a set of noun phrases determined to be included in the given e-mail; generate a set of topics based on the feature representation generated for each e-mail in the plurality of e-mails; and store each topic in the set of topics in association with at least some of the plurality of e-mails. 17. The system of claim 15 wherein, to generate the set of topics based on the feature representation generated for each e-mail in the plurality of e-mails, the processor is configured to: determine a centroid associated with a cluster of feature representations generated for one or more e-mails in the plurality of e-mails; and determine a topic based on the centroid, the generated topic represented by a predetermined number of noun phrases common to the feature representations generated for the one or more e-mails.