I need upgrade spam filter. I have make changes with with filter settings

blacklist,whitelist, DNS/HELO check(s) etc... but problem is spam filter not correct work. The domain i host is very specific.
I need filter spam with keywords like ******, cialis etc...
Where i can put words or phares to filter mails on zimbra?

i have read many times Zimbra wiki = Improving Anti-spam system and do followind blacklist rules.
I and i have found answer to stop spam to commind to my mailserver is i need create rule which filter spam by message body text, e mail header.

Thanks !