Having different default addresses from SO confirmations / invoices

Customers are complaining about the incorrect people are receiving email sales orders confirmations or invoices.

Currently there is no way to differentiate who receives emails (we can't set a contact as default for invoices and a different one as default for sales order confirmations etc…).

It would be beneficial to be able to select different default contacts for different type of documents (customers don't want the account teams to receive so confrimations, or the purchasing team to receive invoices…).