scan.messages.rules From: 192.168. no not working

[Marc Lucke]

/etc/MailScanner/MailScanner.conf

Scan Messages = %rules-dir%/scan.messages.rules
Read IP Address From Received Header = no


/etc/MailScanner/rules/scan.messages.rules

From: 192.168. no
FromOrTo: default  yes


MailScanner restarted.

My understanding is that MailScanner should not scan anything coming 
from an ip address beginning with 192.168. (=192.168.0.0/16).  There is 
no error when restarting MailScanner.  This ruleset is not working.  
Specifically I am attempting to resend (using Thunderbird's resend 
feature) HAM which was picked up as spam.

Can anyone tell me why my ruleset is not working?  Is my understanding 
of the functionality correct?  How can I achieve what I'm trying to do?

I have looked through the lists but I've not found anything specifically 
helpful.


Marc