Allowing multiple email recipients that can receive the invoice when a recurring payment is processed should be basic functionality. It is VERY standard to have a client want to receive a copy of these invoices themselves as well as have one sent to the accounting or billing contact at their company. Telling them, "just forward it yourself" is unprofessional.

This is simply solved by allowing comma separated email address in MANY other applications, including in other Zoho applications.

Hope this missing but basic and fundamental functionality is added soon.