Where can i get email addresses to invite to join my group?

I sent invites to the few people i know and a few people off another group I'm on that have posts related to what my new group is for. Speaking of, my group is for adopting pets FREE!!
Where can i get email addresses to invite to join my group?
There are Yahoo groups designed specifically for owners to promote their groups. Here is a link to one that is very good and has over 6000 members.http://tech.groups.yahoo.com/group/Group...
Reply:heres one poopiscooc_900@yahoo.co.uk