Bulk mail filteration

hi all
     am i on right way for bulk mail filteration
plz help for checking bulk mails

:0
formail -i "X-junkfilter:"\
/home/vpopmail/domains/virtual.example.com/zafar/Maildir/.bulk 

but it  can't works.
plz guide me for filteraing bulk or junk mail. in one recipe
thanks