change EnableSsl to True, and you need the smtp.Port property..... what is the SMTP port???
such as: Gmail port is 587
SmtpClient client = new SmtpClient();
client.Host = "smtp.gmail.com";
client.EnableSsl = true;
client.Credentials = new NetworkCredential("faaaadi.halboni585@gmail.com", "your Password");
client.Port = 587;
client.Send(msg);