Facebook auto respond to like button

Question

I'd like people to receive a message in their inbox when they like my fanpage, and i'm wondering what's the best way to go about this?

I don't know if I can use the SDK to do it because there's no guarantee they will be viewing a canvas when they actually click the like button. They could be clicking the like button from the side bar, from a friend's page, from the official page wall, etc.

Other ideas?

Answer 1

This article describes how to capture a click on the Like button: http://www.saschakimmel.com/2010/05/how-to-capture-clicks-on-the-facebook-like-button/

However, the only way to get someone's email address is by asking the user to authorize the email permission.