System 2.0.0.0 4.0.0.0 System.Configuration.ConfigurationElement To be added. Represents an SMTP pickup directory configuration element. Constructor 2.0.0.0 4.0.0.0 To be added. Initializes a new instance of the class. Property 2.0.0.0 4.0.0.0 System.Configuration.ConfigurationProperty("pickupDirectoryLocation") System.String To be added. To be added. Gets or sets the folder where applications save mail messages to be processed by the SMTP server. Property 2.0.0.0 4.0.0.0 System.Configuration.ConfigurationPropertyCollection To be added. To be added. To be added.