Problem with drug mail

[John Fleming]

I just got an email VERY obvious about selling drugs.  Aren't these headers 
and score a little surprising?  It even contained a URL with the v-word 
misspelled by only one letter.

X-Spam-Status: No, score=1.6 required=5.0 tests=BAYES_99,DRUGS_PAIN,
RCVD_IN_BSP_TRUSTED,RCVD_IN_NJABL_SPAM,RCVD_IN_SORBS_WEB autolearn=no
version=3.0.2
I even have:
score BAYES_99 4.00
in local.cf.
UGH!  On looking at the default scores, I see it got -4 something from being 
RCVD_IN_BSP_TRUSTED!  Could someone elaborate on the utility of BSP_TRUSTED? 
So much for "trust".  I guess when I get [just a little] older, maybe I will 
not consider these spam...