Specifies how email messages are delivered.
Assembly: System (in System.dll)
Email is sent through the network to an SMTP server.
Email is copied to the pickup directory used by a local Internet Information Services (IIS) for delivery.
Email is copied to the directory specified by the SmtpClient::PickupDirectoryLocation property for delivery by an external application.
Use the SmtpClient::DeliveryMethod property to specify the delivery method.enumeration as a parameter to the
Available since 2.0