1. A notification system that reconfigures an electronic message to effect an enhanced notification, the system comprising: an input interface configured to receive at least one electronic message created by or on behalf of a message source for delivery to an intended recipient; a matching engine configured to determine whether the electronic message corresponds to a predetermined definition of an enhanced notification; a user information store configured to store information related to the intended recipient; and an enhancement engine configured to reconfigure the electronic message to the enhanced notification if the information of the user information store indicates that the intended recipient is subscribed to receive the enhanced notification.