I am using free phpld version on 2 of my directories.. Will be buying paid one soon. But i always received Delivery Status Notification (Failure) for email notifications to admin(myself) for link submission, payment etc.. Is this a problem with free version only ?
Take a look at the people who are submitting links to your website? Do the email addresses look a little spammy? Chances are the auto emails that are sent to the link submitters specified email address are simply bouncing back to you as they do not exsist.
They doesn't look spammy.. The same situation exists with paid directory also. When I manually send them emails from yahoo, they do work.