Prohibit delivery- and read- receipts

Mail doesn't send receipts for delivered nor read mail. "Read" receipts aren't supported in any Internet email client I know of, only in proprietary messaging systems such as Outlook/Exchange.

Entourage to the best of my knowledge by default doesn't return delivery receipts either, though I might have missed it in my copy. It appears that the only way to get it to do it is by manually adding special headers.

So if you don't want to be returning receipts, you don't need to worry.

Regards.

I just started getting delivery receipts on specific emails. They are from two different people who claim to have not change their settings. It's sporadic, doesn't come with every single email I send them. I've had a mac for over three years and this has never happened. Any ideas?

If you launch Terminal.app (in /Applications/Utilities) and type "defaults read com.apple.mail UserHeaders" and press enter, and that command returns "The domain/default pair of (com.apple.mail, UserHeaders) does not exist," then you are not the reason that they are returning receipts to you.