Whitelisted mail is still scanned by SA?

[Philip Hachey]

I noticed that mail which has been whitelisted in MS is still sent to 
SpamAssassin (see log snip below).  This is not a problem, but.. why? 
Performance would be better if this did not happen.

Jan 23 07:04:09 mx1 sendmail[12734]: k0NC48Yg012734: 
from=<mailscanner-bounces at lists.mailscanner.info>, size=21721, class=-30, 
nrcpts=1, msgid=<200601231204.k0NC45Ma012483 at bkserver.blacknight.ie>, 
proto=ESMTP, daemon=MTA, relay=bkserver.blacknight.ie [83.98.166.45]
Jan 23 07:04:09 mx1 sendmail[12734]: k0NC48Yg012734: Milter add: header: 
Received-SPF: pass (mx1.city.cornwall.on.ca: domain of 
mailscanner-bounces at lists.mailscanner.info designates 83.98.166.45 as 
permitted sender)
Jan 23 07:04:10 mx1 sendmail[12734]: k0NC48Yg012734: Milter change (add): 
header: X-DCC-CollegeOfNewCaledonia-Metrics: mx1.city.cornwall.on.ca 1189; 
Body=1\n\tFuz1=1 Fuz2=1
Jan 23 07:04:10 mx1 sendmail[12734]: k0NC48Yg012734: 
to=<phachey at city.cornwall.on.ca>, delay=00:00:01, mailer=relay, 
pri=105721, stat=queued
Jan 23 07:04:13 mx1 MailScanner[8896]: Message k0NC48Yg012734 from 
83.98.166.45 (mailscanner-bounces at lists.mailscanner.info) is whitelisted
Jan 23 07:04:18 mx1 MailScanner[8896]: Message k0NC48Yg012734 from 
83.98.166.45 (mailscanner-bounces at lists.mailscanner.info) to 
city.cornwall.on.ca is not spam (whitelisted), SpamAssassin (score=8.119, 
required 5, AWL 0.21, BAYES_50 0.00, HTML_30_40 0.37, HTML_MESSAGE 0.00, 
INFO_TLD 1.27, J_CHICKENPOX_12 0.60, J_CHICKENPOX_22 0.60, J_CHICKENPOX_62 
0.60, NO_REAL_NAME 0.96, SPF_PASS -0.00, VIRUS_WARNING62 3.50)
Jan 23 07:04:23 mx1 MailScanner[8896]: Logging message k0NC48Yg012734 to 
SQL
Jan 23 07:04:23 mx1 MailScanner[11001]: k0NC48Yg012734: Logged to 
MailWatch SQL
Jan 23 07:04:23 mx1 sendmail[12754]: k0NC48Yg012734: 
to=<phachey at city.cornwall.on.ca>, delay=00:00:14, xdelay=00:00:00, 
mailer=relay, pri=195721, relay=######, dsn=2.0.0, stat=Sent (Message 
accepted for delivery)