1. A computer-implemented data delivery system, comprising: a tagging component for adding a user to a social graph for a recipient and tagging the added user with a social relationship tag according to a type of social relationship as defined by a category in the social graph, the social graph comprising an entry for each added user, each entry comprising a link to the added user and at least one social relationship tag; an import component for importing information related to the tagged user from external sources to augment the social graph, the import component comprising a contact aggregation provider to access the external sources using delegated authentication codes or password authorization; a data component for handling data, received from the tagged user, based on the social graph, the data including messages; a perimeter component for accessing the social graph from a perimeter and controlling delivery of the messages at the perimeter of an email deployment, the perimeter component to block, at the perimeter, messages from users tagged as blocked in the social graph from passing to internal message servers; and a processor implementing one or more of the tagging component, the data component, or the perimeter component.