cc w/o removing the mail from /var/spool/mail/user_name

Hello all,

I am new to the list. I hope you don't mind beginners questions.

How to send a copy of a received mail received from "kyko" to another
account and keeping the original on /var/spool/mail/user_name? (The user
reads his email w/ eudora)

The recipes:
              :0
              * ^From.*kyko
              {
                :0 c
                ! weblocal(_at_)edo(_dot_)net  #send cc to

#               :0 c
#               ! clisboa(_at_)edo(_dot_)net   #origial destinatary
                                    #it will generate a 
                                    #loop

              }

Thank you,
Carlos