Virtual SMTP Server Windows 2003

Hi All,

We recently purchased a software called arial email campagin director, our goal is to be able to send out our monthly news letter via an internal smtp server. While i managed to get the software connected to Win2003 Server ISS virtual SMTP server. Seems like the virtual server puts all the messages in a "queue" folder, how do i get the emails to actualy go out? ( I'm very much a newbie, any help would be greatly appreciated)