Restricting inbound Internet mail to Distribution group on Exchange 2003

I’ve been setting up an alias for a new initiative that we’re planning here in the UK, and I need an alias for this on the Exchange server.  Now, initially our list has to be internal only, whilst we plan, and then available for external mail when we’re ready to “launch” this initiative.  So I had a look around the kb’s for how to restrict mail coming into an organisation – this article explains how…

You may find it useful if you get unwanted mails sent to “All users” or whatever…