C# SendMail发送邮件功能实现

最近因为用的发送邮件的地方，就查询了资料，总结以下几个方法

　　1、利用新浪邮箱发送

　　2、利用公司邮箱发送

　　3、利用cdo发送，这种方式要引用interop.adodb.dll（http://www.nodevice.com/dll/interop_adodb_dll/item20357.html）和interop.cdo.dll（）两个文件

具体代码如下：

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("[e-mail]");
  
  msg.cc.add("[e-mail]");

  msg.from = new mailaddress("[e-mail]", "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("[e-mail]", "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("[e-mail]");
  //msg.to.add("[e-mail]");

  
  msg.cc.add("[e-mail]");

  msg.from = new mailaddress("[e-mail]", "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 = "[e-mail]";
  omsg.to = "[e-mail]";


  omsg.send();


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

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