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catching spam with invalid users

2006-07-05 09:59:29
I'm sorry, I've asked this before.  I just can't seem to get a solution with 
procmail.

A mail comes in because "art" is a valid user on my system.  However I see 
everyone else in the header but one or more of those other guys I know 
doesn't exist.  Non-existant users are just as good as spam.

To: flores(_at_)interplas(_dot_)com, henderson(_at_)interplas(_dot_)com, 
chamberlain(_at_)interplas(_dot_)com,
        art(_at_)interplas(_dot_)com, holbrook(_at_)interplas(_dot_)com, 
tom(_at_)xyz(_dot_)com, john(_at_)lmy(_dot_)com


I want to be able to take all the names of @interplas.com of the To: field 
and if there exists at least one invalid user, chunk the whole email.

officiallist="art eric etc.........."
TO_list="flores henderson chamberlain art holbrook"
For EmailName in TO_list
 if EmailName not in officiallist
 then
   is_spam=1
 fi
next

Much appreciated!!
-eric wood 


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