SmtpClient.Credentials Property

public:
 property System::Net::ICredentialsByHost ^ Credentials { System::Net::ICredentialsByHost ^ get(); void set(System::Net::ICredentialsByHost ^ value); };

public System.Net.ICredentialsByHost? Credentials { get; set; }

public System.Net.ICredentialsByHost Credentials { get; set; }

member this.Credentials : System.Net.ICredentialsByHost with get, set

Public Property Credentials As ICredentialsByHost

Property Value

An ICredentialsByHost that represents the credentials to use for authentication; or null if no credentials have been specified.

Exceptions

Examples

The following code example demonstrates setting the credentials used to send an email.

static void CreateTestMessage1( String^ server, int port )
{
   String^ to = L"[email protected]";
   String^ from = L"[email protected]";
   String^ subject = L"Using the new SMTP client.";
   String^ body = L"Using this new feature, you can send an email message from an application very easily.";
   MailMessage^ message = gcnew MailMessage( from,to,subject,body );
   SmtpClient^ client = gcnew SmtpClient( server,port );
   
   // 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 );
   client->~SmtpClient();
}

public static void CreateTestMessage1(string server, int port)
{
    string to = "[email protected]";
    string from = "[email protected]";
    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, port);
    // 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

Some SMTP servers require that the client be authenticated before the server will send email on its behalf. To use your default network credentials, you can set the UseDefaultCredentials to true instead of setting this property. If the UseDefaultCredentials property is set to false, then the value set in the Credentials property will be used for the credentials when connecting to the server. If the UseDefaultCredentials property is set to false and the Credentials property has not been set, then mail is sent to the server anonymously.

Credentials information can also be specified using the application and machine configuration files. For more information, see <mailSettings> Element (Network Settings). If information is specified using the Credentials property, this information overrides the configuration file settings.

Applies to