From the Project/Properties menu, click on the Mailer DSN tab:
This dialog box defines parameters used by the RFC1891 SMTP extension, which allows an SMTP client to specify (a) that delivery status notifications (DSNs) should be generated under certain conditions, (b) whether such notifications should return the contents of the message.
Most modern SMTP servers support the RFC1891 extension. Our testings show that about 60% of servers support this extension
(July, 2002).
Enable the Never check box if you do not want SMTP servers to send
any delivery notifications.
Enable the Success check box if you want to receive delivery success
notifications.
Enable the Failure check box if you want to receive delivery failure
notifications.
Enable the Delay check box if you want to receive delivery delay
notifications.
Select Header Only if you do not wish the entire message to be
returned (recommended).
Enable the Create local delivery notifications check box if you want
to receive notifications when a message sending is aborted. Moreover, it allows
you to receive notifications when using the built-in SMTP server to send
messages.
