4、hedevelopmentofInternet,e-mailhasbecomeafrequently-usedtoolin social life.Takingmyselfforanexample,Ireceivehundredsofe-mailsaboutentertainment,workandlifemonthly.Mailclassificationisoneofthekeypointstomakebetteruseofe-mails.Mailclassificationcanbedonefromdifferentdimensionssuchasspam/hame-m