Outlook 2003 / Exchange 2003 sp2

One user (my boss!) is getting inundated with System Administrator NDR's. I
know that these are coming back as a result of a spoofed email address. 300
+ a day! We have anti spam and anti virus in our enterprise so I know they
are propigating from outside.

Anyway, Outlook 2003 will not allow a rule to be created to move all of
these Sys Admin messages out of her Inbox, and I don't want to disable the
NDRs all together.

How can I keep the benefits of NDR's and yet allow my user to have a "clean"
mailbox.

I'm out of ideas

thanks in advance,
Ray