All URLs in an email will be converted in to a unique address, which will redirect recipients to the intended destination. Luminate will direct the user to the site listed, but it's via a redirect which will capture metrics for email tracking analytics. For example, if you inserted a link to google.com in your email, it may appear like this to the email recipient:

http://myorganization.org/site/R?i=0uPp6q_l5xUzzy2OO1O2Nw

The user will first hit our servers and Luminate records the click-through, then redirects the user to google.com