Bounce to "somewhere else"

[rwk]

Hi,

Can anyone tell me how to cause bounced message to go to "another
address".  We send out messages to customers on behalf of our agents.
When a message bounces, we want it to bounce to the "agent", not to the
sender of the message.

Each agent has their own email address.  Is there something I can put in
the header like:

    Bounce-to: [EMAIL PROTECTED]

Or is there any other way to do it?  We run Qmail and are VERY happy
with it.

Thanks,
Dick