Mismarked mail - AWL

[Bill Anderson]

How is scoring determined for AWL?  I can find the scores for SMTPD_IN_RCVD,
SPAM_PHRASE_00_01, USER_AGENT_OUTLOOK, however can't see what score is given
to AWL.  Why is it being triggered?  This should be a valid email, which it
is in version 3, however with version 4 it is being triggered.

X-MailScanner-SpamCheck: SpamAssassin (score=7.7, required 5, AWL,
        SMTPD_IN_RCVD, SPAM_PHRASE_00_01, USER_AGENT_OUTLOOK)