MailItem.SetMustDeliver method
When overridden in a derived class, the SetMustDeliver method specifies that the message will remain in queue until it is delivered, without expiring or generating a non-delivery report (NDR). Executing the SetMustDeliver method sets the value of the MustDeliver property to true.
Namespace: Microsoft.Exchange.Data.Transport
Assembly: Microsoft.Exchange.Data.Transport (in Microsoft.Exchange.Data.Transport.dll)
Syntax
'Declaration
Public MustOverride Sub SetMustDeliver
'Usage
Dim instance As MailItem
instance.SetMustDeliver()
public abstract void SetMustDeliver()