Send to postmaster instead of freezing?

Can I configure exim to bounce messages to postmaster instead of freezing
them? I can't seem to find in the docs how (if it can be done) to configure
it this way. At least for now, I'd prefer this Sendmail-ish behavior before
I plop Exim on our main email gateway in place of Sendmail. At least for
"double-bounce" message problems.

Thanks!

-------------------------
John C. Ring, Jr.
jcring@???
Network Specialist
Union Switch & Signal Inc.