I am trying to run spamassassin on an internal linux box with sendmail. It is runing but the e-mails I send for tests don't get the *****SPAM***** message in the header. I know the content of the e-mails should be classified as spam and I've even changed the number of hits required to 1 and got no results. Does spamassassin have to be run on a public maiol server?