I have a mail server that scans inbound email messages with SpamAssassin before passing messages to Exchange 2003. When a message is considered spam, it is marked with a certain header. Is there a way to have Exchange 2003 automatically put these messages in each user's junk mail folder based on the existence of this header?
I realize I could add an Outlook rule for every user. I also realize that this rule would actually be implemented server-side. Adding a rule for every user seems hard to implement/maintain. Is there a way to add a global rule that works on all mailboxes?