[fetchmail]Fetchmail forwarding?

How can I configure fetchmail to forward to my Exchange server without
changing the 'TO' field?  Right now, everymail I receive iss addressed
to user1(_at_)domain(_dot_)com, instead of user(_at_)bellsouth(_dot_)net  Here 
is my
.fetchmailrc file.

poll mail.bellsouth.net
        proto pop3
        user "user"
        pass "pass"
        is user1(_at_)domain(_dot_)com

-Devon