Start by making a contact for each of them. Then click on Contacts and select Groups.

Well, one must also try Bulk mailing.

Bulk mailing is simply the act of sending a lot of email messages at once. Bulk e-mail is the legal and ethical alternative to mass mailing random e-mail addresses. The concept is sending as many people your message as possible whilst observing proper online business ethics.

You can generate large number of prospects overnight, by sending your offer to 1million random people. Then convert them into CPA offers or your own product!

If you’re confident about your offer, I suggest you blast to Millions of people and wait for the response! even 1% conversion is scalable –

http://www.Bulkmailinggladiator2010.com – this site boasts of the world’s largest opt-in mailing list.. which can effectively be used for Mass mail marketing.

I’ve recently ordered this for this mailing list – I hope my calculations are right!