Send Email in ASP.Net

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// System.Web.Mail.SmtpMail.SmtpServer is obsolete in 2.0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;
}
}