Gets or sets the Simple Mail Transport Protocol (SMTP) delivery method. The default delivery method is Network.
Assembly: System (in System.dll)
Valid values for this property are Network, PickupDirectoryFromIis, and SpecifiedPickupDirectory. These values have configurable sub-items and have a corresponding section in the System.Net configuration file. All the sections are camel-cased, to allow the users to match the delivery method with their corresponding section names.