#Emailing from this user
  def send_email(recipients, subject, body)
    if self.facebook_install.infinite_session_key
      self.facebook_install.establish_infinite_session!
      FacebookEmailPublisher.mass_message(self.user, self.campaign, recipients.map(&:facebookid), subject, body, self.facebook_app.attributes)
    else 
      raise "No infinite session key found for this app."  
    end
  end