[exim] exim filter for incoming mail to be spam

Dear all,

I'm try to add Exim filter to make mail as spam , but I don't know
the command or the action to change the Spam static, as below

if ("$h_from:" contains "xxxx@???")
   then
    spam_score = 100 ???
  endif

or

if ("$h_from:" contains "xxxx@???")
   then
    X-Spam-Score = Yes ???
  endif

I have asked about that in forum of cpanel but I didn't get advise

Thanks