[Exim] Regex problem

Ok, when it comes to these regexes, I just get brain dead.

# Please, don't teergrube people you relay for you or your own MXes :-)

I am looking at SA-Exim and this regex for SAteergrubecond.

I would like to speficy my sender_host_addresse using netblocks.
How do I rewrite this so that the condition expands to true only
if the sender_host_address is not within any of the THREE netblocks of
a.b.c.d/25 and w.x.y.z/25 and 1.2.3.4/24 ??

${if and { {!eq {$sender_host_address} {a.b.c.d/24}} \
           {!eq {$sender_host_address} {w.x.y.z/24}} \
           {!eq {$sender_host_address} {1.2.3.4/24}} \
         }{1}{0}}

There is something I am missing in between. A 'third eye' is welcome.


-Wash

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