Abstract: The present invention relates to a system, method, or a computer program product that uses third-party data sources for the verification and profiling of identifier information including, for example, email address identifiers. The present invention uses identifier information to gather, aggregate, and record identifier-related data which is then sorted and scored based on user-determined criteria and source biased weighting. The score that is obtained can relate to identifier verification and/or profiling of the identifier for various purposes, and also may be used to detect the potential of fraud associated with the identifier.