1. A system comprising: a document receiver that receives documents from a document source; a classifier engine that processes said documents to create modified documents, said classifier engine analyzing document contents to create metadata relating to said document contents; a processing database that stores a document timestamp for said documents when said documents are processed by said classifier engine; and a relook engine that identifies a change to said document classifier, determines a classifier timestamp for said change, and re-classifies at least a portion of said documents identified by comparing said classifier timestamp with said document timestamp.