Sending EMAIL in ASP.NET

//SmtpMail.SmtpServer = "127.0.0.1";

SmtpMail.SmtpServer = ConfigurationSettings.AppSettings["SmtpServer"];

System.Web.Mail.MailMessage msgMail = new System.Web.Mail.MailMessage();

msgMail.From = txtFrom.Text.ToString();

msgMail.To = txtTo.Text;

msgMail.Cc = txtC.Text;

msgMail.Bcc = txtBcc.Text;

msgMail.Subject = txtSubject.Text;

msgMail.Body = txtMessage.Text;

msgMail.Attachments.Add(new MailAttachment(txtAttachment.Text));

SmtpMail.Send(msgMail);