Is there a way to set a global policy in Exchange 2003, to send a copy of every email going out of a domain to a 'Public Folder'?

you can set a journal mailbox, but not a public folder.Here's a tutorial with a nice list of links to docs on Exchange 2003 journaling.http://www.msexchange.org/tutorials/Implementing-Exchange-2003-Message-Journaling.html