交易失败。服务器响应是：由于垃圾邮件过滤器，发送地址未被接受

SmtpClient smtpClient = new SmtpClient();
        MailMessage message = new MailMessage();
    try
    {
        MailAddress fromAddress = new MailAddress(Textemail.Text, Textfname.Text);

        smtpClient.Host = \"mail.paymycheck.info\";

        //Default port will be 25

        smtpClient.Port = 587;


        message.From = fromAddress;


        message.To.Add(\"support@paymycheck.info\");
        message.Subject = \"Feedback\";

        message.CC.Add(\"support@paymycheck.info\");
        message.IsBodyHtml = false;

        message.Body = Textcomments.Text;

        smtpClient.Send(message);


    }
    catch (Exception ex)
    {

    }