A system in which an initial distribution list is dynamically modified using criteria determined from the current entries in the list. After an originator generates a distribution list and prior to submission of the message to entries on the generated list, the entries in the created distribution list are examined. From this list, features of the entries are identified. From these features, criteria are generated that can be used to generate additional entries that may be included in the list. In one approach, the generated criteria are presented to the user for review and approval. If the originator approves the criteria, the generated list is modified to add additional entries to the distribution based on the generated criteria. If the originator rejects the criteria, the initially generated list is submitted and the message is sent to the entries on the initial list.