In accordance with one aspect of the present disclosure, apparatus are provided that allow for the automatic categorization of the subsets of a user-supplied data set, for example recipient lists for a multivariable distribution campaign. A user interface is disclosed that facilitates the uploading of the user's recipient list. A categorizer is disclosed which categorizes subsets of the user-supplied data. A storage mechanism is disclosed which stores reference categories of data expected by the multi-variable campaign logic. A mapper is disclosed which maps the user supplied data categorized by the categorizer to the reference categories stored by the storage mechanism.