Trading in mailing lists for marketing or publicity by direct mail.
Derivatives
list broker
noun...
They may also pull your address from an auction site or news group posting, purchase it from a disreputable or unsavoury list broker or trick you into replying to fraudulent e-mail messages.
Cultivating a long-term relationship with a list broker can be a valuable use of time and marketing dollars.
When working with a list broker, be as specific as possible regarding your target audience and the geographic area your store covers.