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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)

public SmtpClient()

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.

		public static void CreateTestMessage3()
		{
			MailAddress to = new MailAddress("jane@contoso.com");
			MailAddress from = new MailAddress("ben@contoso.com");
			MailMessage message = new MailMessage(from, to);
			message.Subject = "Using the new SMTP client.";
			message.Body = @"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 = new SmtpClient();
			Console.WriteLine("Sending an e-mail message to {0} at {1} by using the SMTP host={2}.",
				to.User, to.Host, client.Host);
      try {
			  client.Send(message);
			}
			catch (Exception ex) {
			  Console.WriteLine("Exception caught in CreateTestMessage3(): {0}", 
                    ex.ToString() );			  
		  }
		}

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

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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