Email a friend function in registration form

I am creating a site where the membership is free, but to sign up the users have to fill in email addresses to their friends to acknowledge the friends about the site. I wonder if it is possible to automatically send out an email to the friends when an user register? As it is now, I only have made custom registration fields that collect the emails and you have to find the emails in the user database and then send the emails automatically, which is quite messy, especially as you can’t order the users after registration date.

Check out using the hook function to run this process during the registration when you have all the information.

My first suggestion would be this hook:

ws_plugin__s2member_after_configure_user_registration

This should run after all the normal s2member registration processing is done.

The following link is a good explanation about using hooks in wordpres/s2member:

http://www.s2member.com/codex/stable/overview-summary/#src_doc_overview_description

Hope that helps!

Dave