I want to add a new e-mail address, maybe g-mail or outlook, to Windows LIve Mail, and can’t seem to do it

 I am getting 30 spams a day.When I try to create the new address, following all the directions for IMAP, STMP, etc.  I get strange error messages about authentication or "plain tokens" I want to keep the old address for a while until I let everyone know that the new one works. I understand that to create a g mail, I do it within a g-mail account .  Can I not create the new address within Windows Live Mail? that option was declined, maybe because i use Firefox?