Spam Score Analysis

[Carlos Mennens]

So an email I get from a co-worker with no attachments and small
length of plain text get scored and are marked spam:

X-Virus-Scanned: amavisd-new at ***********.org
X-Spam-Flag: YES
X-Spam-Score: 3.324
X-Spam-Level: ***
X-Spam-Status: Yes, score=3.324 tagged_above=-999 required=3
    tests=[BAYES_00=-1.9, KHOP_DYNAMIC=0.906, RCVD_IN_PBL=3.335,
    RCVD_IN_SORBS_DUL=0.001, RDNS_DYNAMIC=0.982] autolearn=no

Is there a way I can determine what caused this email to get scored as such?