C# SendMail发送邮件功能实现

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Mail;
using System.Data;

using CDO;
using ADODB;
namespace SendMailTest
{
 class Program
 {
 static void Main(string[] args)
 {
  SendMail();
 }

 public static string SendMsg()
 {
  DataTable dt = new DataTable();
  dt.Columns.Add("name");
  dt.Columns.Add("date");
  dt.Columns.Add("area");
  dt.Columns.Add("orgnizer");
  dt.Columns.Add("keyword");

  for (int i = 0; i < 10; i++)
  {
  DataRow dr = dt.NewRow();
  dr["name"] = "北文中心影视产权交易平台•影视项目路演季---路演项目征集" + i;
  dr["date"] = "2017-06-30";
  dr["area"] = "北京市 北京电影学院文创园（平房园区）" + i;
  dr["orgnizer"] = "北文中心影视产权交易" + i;
  dr["keyword"] = "影视" + i;
  dt.Rows.Add(dr);

  }

  string MailBody = "<p style=\"font-size: 10pt\">以下内容为系统自动发送，请勿直接回复，谢谢。</p><table cellspacing=\"1\" cellpadding=\"3\" border=\"0\" bgcolor=\"000000\" style=\"font-size: 10pt;line-height: 15px;\">";
  MailBody += "<div align=\"center\">";
  MailBody += "<tr>";
  for (int hcol = 0; hcol < dt.Columns.Count; hcol++)
  {
  MailBody += "<td bgcolor=\"999999\">   ";
  MailBody += dt.Columns[hcol].ColumnName;
  MailBody += "   </td>";
  }
  MailBody += "</tr>";

  for (int row = 0; row < dt.Rows.Count; row++)
  {
  MailBody += "<tr>";
  for (int col = 0; col < dt.Columns.Count; col++)
  {
   MailBody += "<td bgcolor=\"dddddd\">   ";
   MailBody += dt.Rows[row][col].ToString();
   MailBody += "   </td>";
  }
  MailBody += "</tr>";
  }
  MailBody += "</table>";
  MailBody += "</div>";
  return MailBody;
 }

 public static void SendMail()
 {
  MailMessage msg = new MailMessage();
  msg.To.Add("xxx@ctrchina.cn");
  
  msg.CC.Add("xxxx@sina.com");

  msg.From = new MailAddress("ffff@ctrchina.cn", "ffff", System.Text.Encoding.UTF8);
  /* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/
  msg.Subject = "这是测试邮件";//邮件标题 
  msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码 
  //msg.Body = "邮件内容";//邮件内容 
  msg.Body = SendMsg();

  msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码 
  msg.IsBodyHtml = true;//是否是HTML邮件 
  msg.Priority = MailPriority.High;//邮件优先级 

  SmtpClient client = new SmtpClient();
  //client.Host = "smtp.ctrchina.cn";
  client.Host = "210.77.136.200";
  client.Port = 465;
  //client.EnableSsl = true;//经过ssl加密 
  client.Credentials = new System.Net.NetworkCredential("xxx@ctrchina.cn", "password");
  object userState = msg;
  try
  {
  //client.SendAsync(msg, userState);
  client.Send(msg);


  }
  catch (System.Net.Mail.SmtpException ex)
  {
  return;
  }
 }

 public static void SendSinaMail()
 {
  MailMessage msg = new MailMessage();
  msg.To.Add("xxx@ctrchina.cn");
  //msg.To.Add("xxx@sina.com");

  
  msg.CC.Add("xxx@sina.com");

  msg.From = new MailAddress("xxx@sina.com", "shao_sks", System.Text.Encoding.UTF8);
  /* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/
  msg.Subject = "这是测试邮件";//邮件标题 
  msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码 
  //msg.Body = "邮件内容";//邮件内容 
  msg.Body = SendMsg();

  msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码 
  msg.IsBodyHtml = true;//是否是HTML邮件 
  msg.Priority = MailPriority.High;//邮件优先级 

  SmtpClient client = new SmtpClient();
  client.Host = "smtp.sina.com";
  client.Port = 25;
  //client.EnableSsl = true;//经过ssl加密 
  client.Credentials = new System.Net.NetworkCredential("username", "password");
  object userState = msg;
  try
  {
  //client.SendAsync(msg, userState);
  client.Send(msg);


  }
  catch (System.Net.Mail.SmtpException ex)
  {
  return;
  }
 }

 public static void SenMail1()
 {
  try
  {
  CDO.Message oMsg = new CDO.Message();

  Configuration MyConfig = new ConfigurationClass();
  Fields MyFields = MyConfig.Fields;
  MyFields[@"http://schemas.microsoft.com/cdo/configuration/sendusing"].Value = 2;
  MyFields[@"http://schemas.microsoft.com/cdo/configuration/smtpserverport"].Value = 465;
  MyFields[@"http://schemas.microsoft.com/cdo/configuration/smtpserver"].Value = "210.77.136.200";
  MyFields.Update();

  oMsg.Configuration = MyConfig;

  oMsg.Subject = "Test SMTP2911111";
  oMsg.HTMLBody = SendMsg();

  oMsg.From = "shaoks@ctrchina.cn";
  oMsg.To = "shaoks@ctrchina.cn";


  oMsg.Send();


  }
  catch (Exception ex)
  {
  return;
  }
 }
 }
}