[nycbug-talk] CIDR Network Subtraction Tool?

[Tim A.]

Tim A. wrote:
>
> rdr pass inet proto tcp from !<spamd-white> to any \
> 	port smtp -> 127.0.0.1 port spamd
>   

I know I can do this with IPs but can I list multiple tables like this, 
modifying the above rule?

rdr pass inet proto tcp from { !<spamd-white> !<whitelist> } to any \
	port smtp -> 127.0.0.1 port spamd

It seems should be easier to fix in PF than it will be in spamd.