I can confirm it is still not working. In the past 2 days we have had multiple invoices paid through QBs payments, and out of all of them, one had an email notification sent. That one was sent to the user that generated the invoice, not the client facing email. The others were not sent at all. I have access to the email server directly for all users, including messages designated 'spam' and/or caught by the firewall, and they have not been sent to my domain.