One of your Outlook users screens email messages for her boss, and Read Receipt requests pose a problem. The boss doesn’t want to refuse the request but doesn’t want the sender thinking that she’s actually read the message before she has. Can you satisfy both needs? The user needs to screen email and the boss wants to respond to the receipt request only when she’s read the email.
Don’t make the solution any harder than necessary and a compromise is acceptable (that’s your only clue).