Return Receipt in email

Return Receipt in email

Hi Zoho,

I think we all need a return receipt option for invoicing and estimates

it would be nice to know if and when my customers received the estimates / invoices

the idea is make them force to confirm the email so we know to 100% the invoice has been received

Hope this is not so difficult to add (I'm sure it is that's why it is not added yet  )

other then that you guys are awesome and I love ZOHO

Thanks

Mario