public SmtpAppenderSmtpAuthentication Authentication { get; set; }

Public Property Authentication As SmtpAppenderSmtpAuthentication
	Get
	Set

public:
property SmtpAppenderSmtpAuthentication Authentication {
	SmtpAppenderSmtpAuthentication get ();
	void set (SmtpAppenderSmtpAuthentication value);
}

member Authentication : SmtpAppenderSmtpAuthentication with get, set

Property Value

Caution
Authentication is only available on the MS .NET 1.1 runtime.

Valid Authentication mode values are: None, Basic, and Ntlm. The default value is None. When using Basic you must specify the Username and Password to use to authenticate. When using Ntlm the Windows credentials for the current thread, if impersonating, or the process will be used to authenticate.

Reference