Has "bounce" been removed from the Apple Mail AppleScript dictionary?
Yes. I searched the dictionary for Mail.app and it's been removed. I would love to find the code and put it back. This just creates more misery for people dealing with non-technicals who 'don't get it'.
In the Mail Dictionary Bounce is listed as one of the commands the class Message responds to. But if you click on the link, nothing happens.
It appears the function is now disabled in code but not removed from the dictionary.