SmtpClient.PickupDirectoryLocation Property
Gets or sets the folder where applications save mail messages to be processed by the local SMTP server.
Assembly: System (in System.dll)
Mail messages in the pickup directory are automatically sent by a local SMTP server (if present), such as IIS.
The default value for this property can also be set in a machine or application configuration file. Any changes made to the PickupDirectoryLocation property override the configuration file settings.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.