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);
}