SmtpLocalNDRExpireMinutes Metabase Property (IIS 6.0)
The SmtpLocalNDRExpireMinutes property corresponds to where users set the local "Expiration timeout" time period on the Delivery tab. The value in the key is in minutes. This property is listed for both the \smtpsvc and \smtpsvc\1. Changing the setting changes the value of the key for the individual virtual server.
You can configure this property at the following locations in the IIS metabase.
For general code examples, see Code Examples to Configure Metabase Properties.