public static void Run() { // ExStart:RetreiveSMTPServerExtensions SmtpClient client = new SmtpClient("smtp.gmail.com", "*****@*****.**", "password"); client.SecurityOptions = SecurityOptions.SSLExplicit; client.Port = 587; try { string[] caps = client.GetCapabilities(); foreach (string str in caps) { Console.WriteLine(str); } } catch (Exception ex) { Console.WriteLine(ex.Message); } // ExEnd:RetreiveSMTPServerExtensions }