How do I set Domino to automatically delete dead messages caused by the return address being invalid--hence no NDR can be sent? A typical situation is a spam/worm generated email to some generic name like firstname.lastname@example.org and Domino accepts the mail because there is a John in the address book, but doesn't deliver because the name is not unique. Domino then tries to send an NDR to the sender's return address which of course fails. With most other email servers I've used this was just a configuration option (i.e. "Delete undeliverable mail with a bad return address"), but I can't find any such setting in Domino.
Note that I would accept an answer that explains how to automatically delete ALL dead messages regardless of reason.