You can use a generic user ID to track problems with undeliverable e-mail. This method can be useful for both e-mail delivery and configuration problems.
This user receives a copy of the undeliverable e-mail.
The user ID you enter must be an actual ID so that it can effectively monitor nondelivery notices. The sender receives a copy of the nondelivery notice with a list of the recipients who did not receive the e-mail.
Related concepts
Determining problems with e-mail