c#发送邮件功能

protected void Page_Load(object sender, EventArgs e)
    {
        //先到qq邮箱设置中启用smtp服务
        Random random = new Random();
        string checkCode = "";
        string strFrom = "22222222@qq.com";//发件人的邮箱
        string strFromPass = "wei7150760xwl1";//发件人的邮箱密码
        for (int i = 0; i <= 4; i++)
        {
            int num = random.Next(1,10);
            checkCode += num.ToString();
        }
        string validataCode = FormsAuthentication.HashPasswordForStoringInConfigFile(checkCode, "md5");//产生五位的随机数进行加密
        string strSmtpServer = "smtp.qq.com";//qq服务配置
        string strto = "11111111@qq.com";//收件人的邮箱
        string strSubject = "账号激活";//邮件标题
        StringBuilder strBody = new StringBuilder();
        strBody.Append("点击我可以看到惊喜");
        strBody.Append("<a href='operate.aspx?validateCode="+validataCode+"'>点击这里</a></br>");
        SendSMTPEMail(strSmtpServer, strFrom, strFromPass, strto, strSubject, strBody.ToString());
    }
 
 //遵从smtp协议发送邮件
    private void SendSMTPEMail(string strSmtpServer, string strFrom, string strFromPass, string strto, string strSubject, string strBody)
    {
        SmtpClient client = new SmtpClient(strSmtpServer);
        client.UseDefaultCredentials = false;
        client.Credentials = new System.Net.NetworkCredential(strFrom, strFromPass);
        client.DeliveryMethod = SmtpDeliveryMethod.Network;
        MailMessage message = new MailMessage(strFrom, strto, strSubject, strBody);
        message.BodyEncoding = Encoding.UTF8;
        message.IsBodyHtml = true;
        client.Send(message);
    }