I splitted the thread, because your question had nothing to do with the messages in that old thread before.
Please compare a VoIP application like PhonerLite with an email application. In such email application you can't use any email address and any fictive mail server. You need an account on such mail server. Thats the same with VoIP. If you want to call to any real existing phone, you need an account from any VoIP provider. That account data you have to configure in PhonerLite. That is a different account than your existing email account!
If you have no idea from where to get a VoIP account, take a look here: http://www.voipproviderslist.com/voip-service-providers/