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blocking outbound spam

From: Nasser Heidari (nassershatel.ir)
Date: Thu Apr 24 2008 - 00:25:21 CDT


hi ,

i need to control my users from sending outbound spam ,

is it possible that i redirect all smtp(tcp 25) traffic to one mail
relay (postfix) , then control mails , and send it with original ip
address (some kind of ip spoofing !!!)

how can i do that , what is the best solution for controlling large
amount of emails ???

thanks