Most administrators find nondelivery reports (NDRs) valuable as a troubleshooting tool. However, spam now swamps most mail servers that are connected to the Internet, often generating NDRs that queue up on mail servers and consume server resources. Because of this, some administrators now opt to stop sending NDRs in order to free up resources.
Although Exchange 2000 sends NDRs by default, you can disable them. Follow these steps:
Now your server will no longer send NDRs—to legitimate senders or to spammers.