Spectrum Data, LLC is a multifaceted direct marketing service provider specializing in targeted postal and email mailing lists. They offer a range of services including customer profiling, prospect modeling, database analytics, and more to support lead... Spectrum Mailing Lists offers a simple Google Form for opt-out requests; you must provide your full name and complete mailing address or they cannot process it. They say they add you to a perpetual suppression file, and you can submit separate requests for each name variation you receive mail under.