邮件发送465端口

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Threading;
using System.Text;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        SendThreadBy465("172237218@qq.com", "测试465", "测试465");
    }

    /// <summary>
        /// 邮件服务器地址
        /// </summary>
        private static string MailServer = "mail.chnenergy.com.cn";
        /// <summary>
        /// 用户名
        /// </summary>
        private static string MailUserName = "16124065@chnenergy.com.cn";
        /// <summary>
        /// 密码
        /// </summary>
        private static string MailPassword = "******";
        /// <summary>
        /// 名称
        /// </summary>
        private static string MailName = "测试";
        public static void SendThreadBy465(string to, string title, string body)
        {
            new Thread(new ThreadStart(delegate ()
            {
                try
                {
                    System.Web.Mail.MailMessage mmsg = new System.Web.Mail.MailMessage();
                    //验证  
                    mmsg.Subject = title.Trim(); ;// "zhuti1";//邮件主题
 
                    mmsg.BodyFormat = System.Web.Mail.MailFormat.Html;
                    mmsg.Body = body;// "wqerwerwerwer";//邮件正文
                    mmsg.BodyEncoding = Encoding.UTF8;//正文编码
                    mmsg.Priority = System.Web.Mail.MailPriority.High;//优先级
 
                    mmsg.From = MailUserName;//发件者邮箱地址
                    mmsg.To = to;//收件人收箱地址
                    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
                    //登陆名  
                    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", MailUserName);
                    //登陆密码  
                    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", MailPassword);
                    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 465);//端口 
                    mmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", "true");
                    
                    System.Web.Mail.SmtpMail.SmtpServer = MailServer;
                    System.Web.Mail.SmtpMail.Send(mmsg);
                }
                catch (Exception ex)
                {
                    Console.WriteLine(ex.ToString());
                }
 
            })).Start();
        } 
}