Snafui.com - Blackhole Email Addr in Exchange 2000

Problem

I'm getting spam to ex-employee accounts. Microsoft Exchange 2k is sending NDR (non-delivery reports) back to the sender. With spam the sender is usually spoofed so the Exchange SMTP delivery system is spending most of its time dealing with these NDRs, building up a fairly large queue, and take forever to deliver legitimate Email.
I want to black-hole these individual email accounts and others that are hot with spammers. In Unix I would alias the account to /dev/null but I can't find any way to do that in Exchange.

Solution

Finally Google came through and I found this lovely page: http://www.winnetmag.com/Forums/messageview.cfm?catid=40&threadid=31104. In summary, here's what you do:

Create a Global Distribution Group. I called mine "Ex Employees".
Check the "Create an Exchange E-mail address" box.
Finish the creation and open the properties for the new group.
Click the Email Addresses tab and start adding email addresses that you want to black-hole.
Never add anyone to the Members tab.
On the Exchange Advanced tab check "Hide group from Exchange address lists"

As long as you never add anyone as a member of this group, the email will be dropped from Exchange when received. There will be no NDR, no emails to Admin saying that it couldn't be sent, and no file space on your server eaten up with this junk.
I needed a little convincing at first that this worked, but then I thought about it from a programming perspective. The 'member' list is most likely an enumeration or an array/list that's looped with a for or while in the Exchange code. Well what happens when you have a loop that repeats 0 times? It never executes the code within the loop which would be the delivery of the mail. Seems logical to me!