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StatusCode Property
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SmtpException.StatusCode Property

Gets the status code returned by an SMTP server when an e-mail message is transmitted.

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

public SmtpStatusCode StatusCode { get; set; }

Property Value

Type: System.Net.Mail.SmtpStatusCode
An SmtpStatusCode value that indicates the error that occurred.

The following code example displays the value of this property.

		public static void RetryIfBusy(string server)
			MailAddress from = new MailAddress("ben@contoso.com");
			MailAddress to = new MailAddress("jane@contoso.com");
			MailMessage message = new MailMessage(from, to);
			// message.Subject = "Using the SmtpClient class.";
			message.Subject = "Using the SmtpClient class.";
			message.Body = @"Using this feature, you can send an e-mail message from an application very easily.";
			// Add a carbon copy recipient.
			MailAddress copy = new MailAddress("Notifications@contoso.com");
			SmtpClient client = new SmtpClient(server);
			// Include credentials if the server requires them.
			client.Credentials = (ICredentialsByHost)CredentialCache.DefaultNetworkCredentials;
			Console.WriteLine("Sending an e-mail message to {0} using the SMTP host {1}.",
				 to.Address, client.Host);
			catch (SmtpFailedRecipientsException ex)
				for (int i = 0; i < ex.InnerExceptions.Length; i++)
					SmtpStatusCode status = ex.InnerExceptions[i].StatusCode;
					if (status == SmtpStatusCode.MailboxBusy ||
						status == SmtpStatusCode.MailboxUnavailable)
						Console.WriteLine("Delivery failed - retrying in 5 seconds.");
						Console.WriteLine("Failed to deliver message to {0}", 
            catch (Exception ex)
                Console.WriteLine("Exception caught in RetryIfBusy(): {0}", 
                        ex.ToString() );

.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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