Here's an action button to remove the return receipt
Add a column to your inbox view/folder to reveal if there is a return receipt on a message.
Create a column, display value as icon and use the formula: @If(returnreceipt = "1";150;"")
Create an action button that removes the return receipt. Add the following code:
FIELD ReturnReceipt := "0";@All
This will remove the receipt and it is safe to open the message.