try
            {
                MailMessage mail = new MailMessage();
                SmtpClient SmtpServer = new SmtpClient("smtp.bezeqint.net");
                mail.From = new MailAddress("[email protected]");
                mail.To.Add("[email protected]");
                mail.Subject = "Test Mail";
                mail.Body = "This is for testing SMTP mail";
                SmtpServer.Port = 587;
                SmtpServer.Credentials = new System.Net.NetworkCredential("user", "password");
                SmtpServer.EnableSsl = true;
                SmtpServer.Send(mail);
                MessageBox.Show("mail Send");
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }