一个发邮件的类（用CDO实现）

public class SendMail
{
  public SendMail()
  {

  }
  //发送普通文本Email方法入口
  //  From:发信人邮件地址   To:收信人邮件地址
  //     FromName:发信人名称   ToName:收信人名称
  //  Subject:信件主题
  //  Body:邮件正文
  public int Send(string strTitle,string strTo,string strContent)
  {
   try
   {
    CDO.Message oMsg = new CDO.Message();

    oMsg.From = "Administrator@innosis.com.cn";
    oMsg.To = strTo;//"AtenShen@innosis.com.cn";
    oMsg.Subject =strTitle;// "MailTest";

    oMsg.HTMLBody = "<html><body>s"+strContent+"</body></html>";

    CDO.IConfiguration iConfg = oMsg.Configuration;
    ADODB.Fields oFields = iConfg.Fields;

    oFields["http://schemas.microsoft.com/cdo/configuration/sendusing"].Value=2;
    oFields["http://schemas.microsoft.com/cdo/configuration/sendemailaddress"].Value="JamesWang"; //sender mail
    oFields["http://schemas.microsoft.com/cdo/configuration/smtpaccountname"].Value="JamesWang"; //email account
    oFields["http://schemas.microsoft.com/cdo/configuration/sendusername"].Value="JamesWang";
    oFields["http://schemas.microsoft.com/cdo/configuration/sendpassword"].Value="531713Wt";
    oFields["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"].Value=1;
    //value=0 代表Anonymous验证方式（不需要验证）
    //value=1 代表Basic验证方式（使用basic (clear-text) authentication.
    //The configuration sendusername/sendpassword or postusername/postpassword fields are used to specify credentials.）
    //Value=2 代表NTLM验证方式（Secure Password Authentication in Microsoft Outlook Express）
    oFields["http://schemas.microsoft.com/cdo/configuration/languagecode"].Value=0x0804;
    oFields["http://schemas.microsoft.com/cdo/configuration/smtpserver"].Value="192.168.161.32";

    oFields.Update();
    oMsg.BodyPart.Charset="gb2312";
    oMsg.HTMLBodyPart.Charset="gb2312";

    oMsg.Send();
    oMsg = null;
   }
   catch (Exception e)
   {
    return -1;
     throw e;
   }
     return 0;

  }
}