SendMail

    public void SendMail(string subject, string body)
    {
        MailMessage mail = new MailMessage();

        mail.From = new MailAddress(mailAddress);
        mail.To.Add(mailAddress);
        mail.Subject = subject;
        mail.Body = body;

        SmtpClient smtpServer = new SmtpClient("smtp.gmail.com");
        smtpServer.Port = 587;
        smtpServer.Credentials = new NetworkCredential(mailAddress, mailPassword) as ICredentialsByHost;
        smtpServer.EnableSsl = true;
        ServicePointManager.ServerCertificateValidationCallback =
            delegate (object s, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
            { return true; };
        smtpServer.Send(mail);
        Debug.Log("mail success");
    }