Love the idea of this plugin! Well, half of it. The email responder has a real problem. I have logged what is happening and from what I see, the email responder is picking up my own Paypal email address and not that of the buyer, so it is really impossible to respond. But even then, an email to me is logged as being sent by Wordpress, but I never receive it.
I have to agree with earlier comments. No email out, no responder.