Send Mail in Asp.Net

protected void SendMail()
    {
        var fromAddress = YourEmail.Text.ToString();
        var toAddress = "abc@yahoo.ca";// Email Address from where you send the mail
        const string fromPassword = "12345678";//Password of your email address
        string subject = YourSubject.Text.ToString();
        string body = "From: " + YourName.Text + "\n";
        body += "Email: " + YourEmail.Text + "\n";
        body += "Subject: " + YourSubject.Text + "\n";
        body += "Question: \n" + Comments.Text + "\n";

        var smtp = new System.Net.Mail.SmtpClient();
        {
            smtp.Host = "smtp.mail.yahoo.ca";
            smtp.Port = 587;  
            smtp.EnableSsl = true;
            smtp.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
            smtp.Credentials = new NetworkCredential(fromAddress, fromPassword);
            smtp.Timeout = 20000;
        }
        smtp.Send(fromAddress, toAddress, subject, body);     
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        try
        {
            SendMail();
            lblMsgSend.Text = "Your Comments after sending the mail";
            lblMsgSend.Visible = true;
            YourSubject.Text = "";
            YourEmail.Text = "";
            YourName.Text = "";
            Comments.Text = "";
        }
        catch (Exception) { }
    }