No - the emails sent back are automated however, there are times when the system gremlins take over - unfortunately there's nothing you can do on your end except contact Tech Support - on this page, at the bottom there's a link "Contact Support", you can login on the next page, then you can complete and submit a support ticket.
Note, some developers use PayPal's IPN feature to trigger their own custom emails which are automatically sent to their customers. Just something you can look into. Here's the link.
