Exchange 2003 delete all message from a sender

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http://serverfault.com – I would like to remove all old message from a sender in all mailboxes of exchange 2003 server. This because in my company there is a very bad habit: to use scan to email, then i need to remove all message from the "scan/printer" sender older than 30 days. Is it possible? I looked for Recipients Policies but i can choose only mailbox ower filter, not messages filter. (HowTos)