Hi Krico,
A malicious user could send an e-mail to the outter world by setting up an autoreply (mailReplyText+deliveryMode) and then forging an e-mail from someone to himself.
I didn't understand this exploit. Can you explain it better?
But even with this condition, I think it's worth to implement this feature. It will be effective for 99,9999999999...% of the cases.
The guys with the knowledge you're suggesting are root of the mailservers, not the ordinary users.
regards,bnegrao
