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Hi all,
I have some dns based black and whitelists that I'd like to check when
receiving messages. What I want is for certain filters I later run to
skip processing if something like dnswl has them listed. I could do the
whitelist checks later, but I have reasons why I'd like them all done at
once. I'm aware of how to do blacklists, and I think I know of a way to
get whitelisting to work too. However, before I try this in production,
I want to run it past you all and make sure no one can see any potential
issues I haven't thought of. I'm thinking, if the address is
whitelisted, all one need do is to set BLOCK to an empty string. This
line should, if I'm not mistaken, refuse mail from anyone listed on
spamhaus while setting BLOCK to the empty string (and allowing the mail
to pass) for anything on dnswl.

- -block="list.dnswl.org,BLOCK,\"\" zen.spamhaus.org,BLOCK"

Will this always have the consequences I am intending? If  not, what am
I doing wrong and how do I fix it?
- --
Those of you who think they know everything are very annoying to those
of us who actually do.
Joseph C. Lininger, <[email protected]>
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