[freeside-users] Not Sending Invoices (Mail Setup)

[GlobalNet, NOC]

Not sending invoices. New install
I see no error but the invoice never shows up.

I see in configuration that mailserver is set to localhost.

First I wasn't sure if freeside had some sort of built in function

Anyway what is my options?

Is it possible to hace freeside use an external mailserver that uses smtp 
authentation?
requires username/password to send mail?

Jeff