Sending mail using Asp.net

<appsettings>
  <add key="SMTP" value="my SMTP" />
  <add key="FROMEMAIL" value="myEmail address" />
  <add key="FROMPWD" value="pwd" />
  <add key="PORT" value="25" />
</appsettings>

try
{
    string mFrom = From.ToString().Trim();
    string mTo = To.ToString().Trim();
    string mSubject = Subj.ToString().Trim();
    string mMsg = Msg.ToString().Trim();
    string mMailServer = ConfigurationManager.AppSettings.Get("SMTP");
    int mPort = Convert.ToInt32(ConfigurationManager.AppSettings.Get("PORT"));
    MailMessage message = new MailMessage(mFrom, mTo, mSubject, mMsg);
    SmtpClient mySmtpClient = new SmtpClient(mMailServer, mPort);
    if (Bcc != "") 
    {
        message.Bcc.Add(Bcc);
    }
    // mySmtpClient.Credentials = new 
    // System.Net.NetworkCredential(ConfigurationManager.AppSettings["FROMEMAIL"], 
    // ConfigurationManager.AppSettings["FROMPWD"]);
    //mySmtpClient.EnableSsl = true;
    message.Priority = MailPriority.High;
    message.IsBodyHtml = false;
    mySmtpClient.UseDefaultCredentials = true;
    mySmtpClient.Send(message);
    return true;
    }
catch (Exception ex)
{
    return false;
}