using System;
using System.Net.Mail;
using System.Net;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;

namespace smtp_test
{
    class Program
    {
        static void Main(string[] args)
        {
            ServicePointManager.ServerCertificateValidationCallback =
                        delegate (
                            object s,
                            X509Certificate certificate,
                            X509Chain chain,
                            SslPolicyErrors sslPolicyErrors
                        )
                        {
                            return true;
                        };
            try
            {
                SmtpClient cl = new SmtpClient("gekkoin.com", 25);
                MailAddress from = new MailAddress("reports@gekkoin.com");
                MailAddress to = new MailAddress("reports@gekkoin.com");
                MailMessage msg = new MailMessage(from, to);
                msg.Body = "test";
                cl.Credentials = new NetworkCredential("Gekkoin", "xK201ipD9OH3qmDro8O3xdm");
                cl.EnableSsl = true;
                cl.Send(msg);
                msg.Dispose();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }
    }
}