This was working just fine, but not any more.
I create a temporary link but no email gets sent.
Followed through on advice on this page: http://www.icprojects.net/paid-downloads-faq.html. I changed the from address to an email address that functions.
But still no email has been sent.
PayPal transactions are going through fine, and appear in the transaction list. I am not sure if the email is going at that point or not, possibly not which is why buyer has a problem. But I have sent the buyer a new link and that email did not arrive, and I have sent myself 2 links and neither has arrived.
What to do?