ad.net 发送邮件失败问题

Question

用了一段网上的代码，然后代码发送异常，弹框的内容看不懂，请大神给解释一下！

                        System.Net.Mail.SmtpClient client = new SmtpClient();
            client.Host = "smtp.163.com";  //发送邮件所使用的Smtp事务的主机名称或IP地址
            client.UseDefaultCredentials = false;
            //NetworkCredential(发送者邮件地址,发送者邮箱密码)
            client.Credentials = new System.Net.NetworkCredential("[e-mail]",
                "xxxxxxx");
            client.DeliveryMethod = SmtpDeliveryMethod.Network;　　//电子邮件通过网络发送到Smtp服务器

            //MailMessage(发件人地址,收件人地址)
            MailMessage message = new MailMessage("[e-mail]",
                "[e-mail]");
            message.Subject = "hi";　　//邮件主题
            message.Body = "hi";　　 //邮件内容
            message.BodyEncoding = System.Text.Encoding.UTF8;　//邮件正文的编码方式
            message.IsBodyHtml = true;

            try
            {
                client.Send(message);
                MessageBox.Show("E-Mail sucessfully send to:xxxx![图片说明](https://img-ask.csdn.net/upload/201511/13/1447384340_437113.png)@qq.com");
            }
            catch (Exception ex)
            {
                MessageBox.Show("E-Mail send fail!" + ex.ToString());
            }

Answer 1