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SmtpClient Constructor

Initializes a new instance of the SmtpClient class by using configuration file settings.

Namespace:  System.Net.Mail
Assembly:  System (in System.dll)

This constructor initializes the Host, Credentials, and Port properties for the new SmtpClient by using the settings in the application or machine configuration files. For more information, see <mailSettings> Element (Network Settings).

The following code example demonstrates sending an e-mail message.

   static void CreateTestMessage3()
      MailAddress^ to = gcnew MailAddress( L"jane@contoso.com" );
      MailAddress^ from = gcnew MailAddress( L"ben@contoso.com" );
      MailMessage^ message = gcnew MailMessage( from,to );
      message->Subject = L"Using the new SMTP client.";
      message->Body = L"Using this new feature, you can send an e-mail message from an application very easily.";

      // Use the application or machine configuration to get the  
      // host, port, and credentials.
      SmtpClient^ client = gcnew SmtpClient;
      Console::WriteLine( L"Sending an e-mail message to {0} at {1} by using the SMTP host {2}.", to->User, to->Host, client->Host );
      client->Send( message );

For an example of the <mailSettings> node in the application or machine configuration file, see <mailSettings> Element (Network Settings).

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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