Abstract: Email analysis and control system comprising: at least one server comprising an email exchange module and an email control module; and a plurality of users' computers running an email application and a client application communicating with the email application, the email control module comprising a rules database and a server program communicating with the client application, the client application configured to analyze each email sent by the user's email application, determine its importance or relevancy to each addressee according to the rules and act accordingly, the client application further configured to analyze each email received by the user's email application, determine its importance or relevancy to the user according to said rules and act accordingly.