Sending Email through custom save action in WFFM

Hello Everyone,
        In Web Form For Marketers, I was creating a 'Custom Email Sending Save Action' & wanted to send E-mail to Recipient from front-end. I was using 'Gmail SMTP' for sending Email. For this I used below code for web.config:

<setting name="MailServer" value="smtp.gmail.com"/>
<setting name="MailServerPort" value="587"/>

And in the end of web.config before </configuration> added below code:
<system.net>
    <mailSettings>
      <smtp deliveryMethod="Network">
        <network enableSsl="true" />
      </smtp>
    </mailSettings>
  </system.net>

And now in my class file implements 2 interfaces: ISaveAction & ISubmit and override their methods. The code is below:

public void Execute(Sitecore.Data.ID formid, AdaptedResultList fields, params object[] data)
        {
            NameValueCollection formData = new NameValueCollection();
            foreach (AdaptedControlResult acr in fields)
            {
                formData[acr.FieldName] = acr.Value;
            }
            try
            {
                // get field values of form
                string emailTo = formData["To"];
                string emailFrom = formData["From"];
                string personalMsg = formData["Message"];
                bool result = false;
                if (!string.IsNullOrEmpty(emailFrom) && !string.IsNullOrEmpty(emailTo))
                {
                    // send mail
                    result = SendEmail(emailTo, emailFrom, personalMsg);
                }
                // if mail sending fail then show error massege
                if (result == false)
                {
                    Sitecore.Diagnostics.Log.Error("Some error occcured while sending email", this);
                }
            }
            catch (Exception ex)
            {
                Sitecore.Diagnostics.Log.Error(ex.Message.ToString(), this);
            }
        }


        #region SendEmail function
        public static bool SendEmail(string To, string From, string Message)
        {
            bool result = true;

            try
            {
                MailMessage mailMsg = new MailMessage();

                // mailaddress of sender
                MailAddress mailFrom = new MailAddress(From);
                mailMsg.From = mailFrom;

                // mail addresses for recipients
                try
                {
                     MailAddress mailTo = new MailAddress(To);
                    mailMsg.To.Add(mailTo);
                }
                catch
                {

                }
               
                mailMsg.Body = Message;
                mailMsg.IsBodyHtml = true;
                var smtp = new SmtpClient(Sitecore.Configuration.Settings.MailServer, Sitecore.Configuration.Settings.MailServerPort);
                smtp.Credentials = new System.Net.NetworkCredential("example@gmail.com", "password");
                smtp.EnableSsl = true;
                smtp.Send(mailMsg);
            }
            catch
            {
                result = false;
            }
            return result;
        }
     #endregion

        public void Submit(Sitecore.Data.ID formid, AdaptedResultList fields)
        {
            Execute(formid, fields);
        }

        #region IOnLoad Members
        public void OnLoad(bool isPostback, RenderFormArgs args)
        {

        }
        #endregion