asp.net2.0邮箱发送代码

using System.Net.Mail.SmtpClient;

using System.Net.MailMessage; 

protected void btnSendmail_Click(object sender, EventArgs e)
      {
        // System.Web.Mail.SmtpMail.SmtpServer is obsolete in 2.0

        // System.Net.Mail.SmtpClient is the alternate class for this in 2.0

        SmtpClient smtpClient = new SmtpClient();
        MailMessage message = new MailMessage();

        try
        {
            MailAddress fromAddress = new MailAddress(txtEmail.Text, txtName.Text);

            // You can specify the host name or ipaddress of your server

            // Default in IIS will be localhost 

            smtpClient.Host = "localhost";

            //Default port will be 25

            smtpClient.Port = 25;

            //From address will be given as a MailAddress Object

            message.From = fromAddress;

            // To address collection of MailAddress

            message.To.Add("admin1@yoursite.com");
            message.Subject = "Feedback";

            // CC and BCC optional

            // MailAddressCollection class is used to send the email to various users

            // You can specify Address as new MailAddress("admin1@yoursite.com")

            message.CC.Add("admin1@yoursite.com");
            message.CC.Add("admin2@yoursite.com");

            // You can specify Address directly as string

            message.Bcc.Add(new MailAddress("admin3@yoursite.com"));
            message.Bcc.Add(new MailAddress("admin4@yoursite.com"));

            //Body can be Html or text format

            //Specify true if it  is html message

            message.IsBodyHtml = false;

            // Message body content

            message.Body = txtMessage.Text;
         
            // Send SMTP mail

            smtpClient.Send(message);

            lblStatus.Text = "Email successfully sent.";
        }
        catch (Exception ex)
        {
            lblStatus.Text = "Send Email Failed." + ex.Message;
        }
      }