SmtpClient.Timeout Property

Definition

Namespace:

System.Net.Mail

Assemblies:

netstandard.dll, System.Net.Mail.dll

Source:

SmtpClient.cs

Gets or sets a value that specifies the amount of time after which a synchronous Send call times out.

C#

public int Timeout { get; set; }

Property Value

Int32

An Int32 that specifies the time-out value in milliseconds. The default value is 100,000 (100 seconds).

Exceptions

ArgumentOutOfRangeException

The value specified for a set operation was less than zero.

InvalidOperationException

You cannot change the value of this property when an email is being sent.

Examples

The following code example demonstrates getting and setting the time-out value.

C#

public static void CreateTimeoutTestMessage(string server)
{
    string to = "jane@contoso.com";
    string from = "ben@contoso.com";
    string subject = "Using the new SMTP client.";
    string body = @"Using this new feature, you can send an email message from an application very easily.";
    MailMessage message = new MailMessage(from, to, subject, body);
    SmtpClient client = new SmtpClient(server);
    Console.WriteLine("Changing time out from {0} to 100.", client.Timeout);
    client.Timeout = 100;
    // Credentials are necessary if the server requires the client
    // to authenticate before it will send email on the client's behalf.
    client.Credentials = CredentialCache.DefaultNetworkCredentials;
    client.Send(message);
}

Remarks

By default, calls to the Send method block until the operation completes. If you set the Timeout property to a positive value, and a Send operation cannot complete in the allotted time, the SmtpClient class throws an SmtpException exception.

To send a message and continue executing in the application thread, use the SendAsync method.

Applies to