Abstract: Remote segmentation applied to a segmentation data mart allows a marketer to create a personalized email campaign for a selected segment of customers. Segmentation data is collected from a plurality of third party sources, imported and cleansed. The marketer may query a data mart with a user-defined rule created with parameters selected from fields available in the data mart. The marketer submits the query and is presented with a count with which the marketer may determine if the segment will be cost effective for the marketing campaign. If the count is acceptable, the query is saved. Later, when the marketer creates the email message for a particular campaign, s/he assigns the segment to the campaign. When the campaign is released, the query extracts email addresses currently meeting the criteria of the query and uses the addresses for distributing the email.