Service Extension for Delivery Status Notifications (DSNs)

Chilkat’s email component supports the SMTP DSN extensions (RFC 3461).

The MailMan object includes these properties specific to RFC 3461:

DsnEnvid: (An SMTP DSN service extension feature) An arbitrary string that will be used as the ENVID property when sending email. See RFC 3461 for more details.

DsnNotify: (An SMTP DSN service extension feature) A string that will be used as the NOTIFY parameter when sending email. (See RFC 3461 for more details. ) This string can be left blank, or can be set to “NEVER”, or any combination of a comma-separated list of “SUCCESS”, “FAILURE”, or “NOTIFY”.

DsnRet: (An SMTP DSN service extension feature) A string that will be used as the RET parameter when sending email. (See RFC 3461 for more details. ) This string can be left blank, or can be set to “FULL” to receive entire-message DSN notifications, or “HDRS” to receive header-only DSN notifications.