Can't seem to get Spamassassin to blacklist_from with how to using vmail

[3rods]

Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Ubuntu 10.04)
I used this how to: http://www.howtoforge.com/virtual-us...l-ubuntu-10.04


I installed everything in the tutorial except squirrelmail.

I'm having issues trying to get spamassassin to add emails to the blacklist. I've added a file in /root/.spamassassin/user_prefs and I've placed "blacklist_from email@domain.com" in the first line. I reloaded SA and it doesn't trash emails from that user.

I've also tried adding the file to the vmail directory and even under the vmail/user directory, and also in the local.cf file.

Where do I place black lists for spamassassin using this configuration?