[geeks] Email experts?

[Big Endian]

My company does a lot of email work.  The problem is we need to sort 
mail by destination.  The bulk of the mail (66%) goes to 4-5 
domains(whitehouse.gov,senate.gov, etc), the rest goes to our 
clients/users.  I'm trying to find the least kludgey way to seperate 
out the bulk class email (senate mail, etc) from the user mail. 
Anybody ever done something like this?  Recommendations?

daniel
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