Buddypress - New user never receives activation / confirmation email

If a new user goes to register on my site (www.idahofallsnow.com) they make it as far as getting the notification that their account has been created and now they need to click on the link in the activation email. Only this email never shows up. So, none of these none users can access the website. I'm starting to get very frustrated.

On a somewhat related topic, if I have the Ultimate Facebook plugin activated, users should be able to use the 'Login with Facebook' button, and one-click registration.... this is also not working. When you click on that button, nothing happens. I will post this part of my question on the plugin page.

Thanks in advance for the help.
Janet