67. The non-transitory computer readable medium of claim 60 , further including instructions to cause the processor to: determine the relevance based at least in part on the action taken by the recipient with respect to the second electronic message.
60. A non-transitory computer readable medium encoded with a computer program including instructions to cause a processor to: analyze electronic messages of a first user with respect to one or more features associated with the electronic messages, including to identify a sender of a first electronic message received by the first user and determine relevance of the first electronic message with respect to the first user as a function of at least one of, a relationship between the sender and the first user within an implied social graph of electronic message users, a quality of the relationship between the sender and the first user, a syntactic structure of the first electronic message, metadata associated with the first electronic message, a language used in the first electronic message, a character set used in the first electronic message, an action taken by the first user with respect to a second electronic message for which one or more features are similar to one or more corresponding features of the first electronic message, and an action taken by a second user with respect to an electronic message received by the second user for which one or more features are similar to one or more corresponding features of the first electronic message; associate descriptive tags with the electronic messages of the first user based on analysis results; and perform tasks with respect to the electronic messages of the first user, on behalf of the first user, based on the descriptive tags associated with the respective electronic messages.