Hi Hanasaki!
> Not trying to be argumentative here but, why not? It doesn't seem wise,
> to me, to allow an outsider, who should not have the ability to send
> email from the exim server, to create a fake bounce to someone.
Then do not accept the mail in the first place. If you accept a mail
for delivery or relaying, you are responsible for generating a bounce
if it cannot be delivered. Better to reject the mail at SMTP time,
preferably in response to an RCPT command.
Andy
--
Andreas J. Mueller email: <andy@???>