How to send an encrypted url link in MVC

public ActionResult Index(MailModel model)
      {
          using (MailMessage mm = new MailMessage("name@gmail.com", model.To))
          {
              string url = "http://localhost:49458/SendMailer/Login";
              string body = "Hello " + model.name + ",";
              body += "<br /><br />Please click the following link for Login Page";
              body += "<br /><a href = '"+url+ "'>Click here to go Login Page</a>";
              body += "<br /><br />Thanks";
              mm.Body = body;
              mm.IsBodyHtml = true;
              SmtpClient smtp = new SmtpClient();
              smtp.Host = "smtp.gmail.com";
              smtp.EnableSsl = true;
              NetworkCredential NetworkCred = new NetworkCredential("name@gmail.com", "pwd");
              smtp.UseDefaultCredentials = true;
              smtp.Credentials = NetworkCred;
              smtp.Port = 587;
              smtp.Send(mm);
          }
          return View();
      }

<fieldset>
    <legend>
        Send Email
    </legend>
    @using (Html.BeginForm())
    {
        @Html.ValidationSummary()
      
        <p>To: </p>
        <p>@Html.TextBoxFor(m => m.To)</p>
        <p>name: </p>
        <p>@Html.TextBoxFor(m => m.name)</p>
        <p>From mail: </p>
        <p>@Html.TextBoxFor(m => m.Email)</p>

        <input type="submit" value="Send" />
    }  </fieldset>

public class MailModel
{
    public string To { get; set; }
      public string Email { get; set; }
    public string name { get; set; }
}