http://v6xisryosn2n5rq7xma2277rzd6yihxqn5bd5vnqeb57qvsfvog4noyd.onion/app.php/help/faq
Otherwise, you must link to an image stored on a publicly accessible web server, e.g. http://www.example.com/my-picture.gif. You cannot link to pictures stored on your own PC (unless it is a publicly accessible server) nor images stored behind authentication mechanisms, e.g. hotmail or yahoo mailboxes, password protected sites, etc.