Database Source Name
A data structure used to describe a connection to a database.
Delivery Status Notification
Delivery Status Notification message, an automated electronic mail message about a delivery problem.
In the internet's standard e-mail protocol SMTP, a bounce message, or (failed) Delivery Status Notification (DSN) message, aka Non-Delivery Report/Receipt (NDR), Non-Delivery Notification (NDN), or simply a bounce is an automated electronic mail message from a mail system informing the sender of another message about a delivery problem. The original message is said to have bounced.