Abstract: A method, system and electronic device are provided for classification of data objects such as messages. A number of rule engines, each of which may be associated with a different application or module, are provided on the electronic device. For each data object obtained by the electronic device, matching rule engines are identified, and the data object is processed by the matching rule engines to determine one or more classification values for the data object. The determined classification is stored in association with a data object identifier. Data objects can be subsequently collated according to their classification, or aggregations of data object listings can be collected and displayed in a plurality of views corresponding to the various classifications.