How to prevent exim from including the original email in a bounce message

If you want to stop exim from including the orignal message in a bounced email, add this line to the top section of your /etc/exim.conf:

bounce_return_message  = false

save, exit and restart exim.  This doesn't stop bounce emails, only the orignal message from being incuded as part of the message. (so it doesn't get re-flagged as spam on the other end)