The invention provides a method and system for formatting electronic mail for transmission, in which electronic mail messages include the operational results of one or more applets. An electronic mail client creates an electronic mail message using one or more applets, each of which may operate to actively receive, transform, and display information to be presented with the electronic mail message. At or near a time when the electronic mail message is formatted for transmission, editable program code for the applets is removed, and any dynamic links between the applets are broken. The electronic mail message made available to the receiver can thus include active elements, but any applets which are received are not editable by the receiver.