NetCreations' PostMasterDirect.com database is currently growing at a rate of more than 80,000 email addresses a day from the NetCreations network of more than 380 partner sites, including About.com, internet.com, Entrepreneur Magazine and GroupLotto.
The database is made up exclusively of double opt-in addresses belonging to Internet users who have requested promotional information related to specific topics of interest and verified their request by replying to a confirmation email.