[Exim] filter not for all recipient

The filter is:
#############################################
if $header_cc: contains "someboy@???"
then
deliver <another_user@???>
endif
#############################################

The problem is:
If the CC field contains more than one addresses, the another ones
delivered to the address <another_user@???> too...but I dont't want
this..

Sorry for my bad english..:-)

--
kuksi
-----------------------------
legalabbis...(gondolom en:-)
kuksi@???
-----------------------------