article on blocking by subnets

[Barry Gould]

While thinking about how to test this, I was looking at the output of 
bogoutil -d on my 2 databases...

I noticed that hosts from which I frequently receive mail were missing from 
both db's.

E.g. a header would contain:
Received: from mail.domain.com (domain.exo.com [209.25.7.9] (may be forged))

the IP, 209.25.7.9, does not appear in either of my DB's, even though I get 
tons of ham (and forwarded spam) from that site.

Is the parser throwing out the IP because of the []'s, or because it's not 
a 'significant' token?

Barry