c#发送邮件

public static void SendEmail()
        {
            try
            {
                if (DateTime.Now.Day % 2 == 0)
                {
                    //实例化SmtpClient
                    SmtpClient client = new SmtpClient("smtp.126.com", 25);
                    //出站方式设置为NetWork
                    client.DeliveryMethod = SmtpDeliveryMethod.Network;
                    //smtp服务器验证并制定账号密码
                    client.Credentials = new NetworkCredential("xxx@126.com", "123456");
                    MailMessage message = new MailMessage();
                    //设置优先级
                    message.Priority = MailPriority.Normal;
                    //设置收件方看到的邮件来源为:发送方邮件地址、来源标题、编码
                    message.From = new MailAddress("xxx@126.com", "2222", Encoding.GetEncoding("gb2312"));
                    //接收方
                    message.To.Add("dddddd@163.com");
                    //标题
                    message.Subject = "标题";
                    message.SubjectEncoding = Encoding.GetEncoding("gb2312");
                    //邮件正文是否支持HTML
                    message.IsBodyHtml = true;
                    //正文编码
                    message.BodyEncoding = Encoding.GetEncoding("gb2312");
                    string ip = new Regex(@"您的IP地址是：\[([\d.]+?)\]").Match
                        (new WebClient().DownloadString("http://www.ip138.com/ip2city.asp")).Groups[1].Value;
                    client.Send("<font color='red'>测试</font><br/>");
                }
            }
            catch (Exception e)
            {
            }
        }