We sell on Amazon, eBay and via the website. I have setup the CC in the System > Configuration > Sales > Sales Emails to copy all of the emails there to the store owner (Order, Order Comments, Invoice, Invoice Comments, Shipment, Shipment Comments, Credit Memo, Credit Memo Comments).
Store owner wants to receive emails generated from the website only. Other orders from marketplaces, currently Amazon and eBay, these email should not be sent to him via the CC field. They have Order ID prefixes of AMZ and EBAY in front of them while the website orders have no prefix.
How can this be accomplished?