Two ways:
1) Sell the list (don't expect it would bring your decent money, somewhere around $10-$20 per 1K as seems like that list is not legit, otherwise you will have known itself what to do with it). 99% of reputable and interested marketers wouldn't want to buy leads from such sources.
2) Monetize the list yourself (more harder way, but payout is much higher than from option #1)
Try to sell leads first and go learn email marketing by the way. Good luck!