Ajax doesn't call method in production - ajax

Question

This is probably something simple, but I can't find what is wrong to give me this problem.
I have a form in a HTML page that calls, on click, a method in a controller via Ajax. It works perfectly in my development machine, but when I put it in production environment the call never gets to the controller. Anyone have any ideas why? I've seen many questions like this, most of them saying it's most likely a problem with the action path, but I've tried a lot of diferent ways to call it (with razor html helpers, passing the absolute path, etc) and got nothing.
The form (simple):
<form action="/Home/SendMail/" id="contactForm" type="post">
<input type="text" name="name" id="name">
<input type="email" name="email" id="email">
<input type="text" name="subject" id="subject">
<textarea name="message" id="message"></textarea>
<input type="submit" value="Enviar Mensagem">
</form>
The ajax call:
$("#contactForm").validate({
submitHandler: function(form) {
var submitButton = $(this.submitButton);
submitButton.button("loading");
var url = $("#contactForm").attr("action");
$.ajax({
type: "POST",
url: url,
data: {
"name": $("#contactForm #name").val(),
"email": $("#contactForm #email").val(),
"subject": $("#contactForm #subject").val(),
"message": $("#contactForm #message").val()
},
dataType: "json",
success: function (data) {
if (data.response == "success") {
$("#contactSuccess").removeClass("hidden");
$("#contactError").addClass("hidden");
$("#contactForm #name, #contactForm #email, #contactForm #subject, #contactForm #message")
.val("")
.blur()
.closest(".control-group")
.removeClass("success")
.removeClass("error");
if(($("#contactSuccess").position().top - 80) < $(window).scrollTop()){
$("html, body").animate({
scrollTop: $("#contactSuccess").offset().top - 80
}, 300);
}
} else {
$("#contactError").removeClass("hidden");
$("#contactSuccess").addClass("hidden");
if(($("#contactError").position().top - 80) < $(window).scrollTop()){
$("html, body").animate({
scrollTop: $("#contactError").offset().top - 80
}, 300);
}
}
},
The controller method:
public class HomeController : Controller
{
[HttpPost]
public JsonResult SendMail(string name, string email, string subject, string message)
{
try
{
string emailTo = "myemail#example.com";
MailMessage Email = new MailMessage();
Email.From = new MailAddress("mail#example.comr");
string[] emailsDestinarios = emailTo.Split(';');
foreach (string emailDestinatario in emailsDestinarios)
{
Email.To.Add(new MailAddress(emailDestinatario));
}
Email.Subject = subject;
Email.IsBodyHtml = true;
Email.Body = DateTime.Now.ToString() + "<br />" + name + "<br />" + email + "<br /><br /><b>" + subject + "</b><br /><br />" + message;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.example.com";
smtp.Port = 587;
smtp.EnableSsl = true;
smtp.Credentials = new System.Net.NetworkCredential("mail#example.com", "mypassword");
smtp.Send(Email);
return Json(new { response = "success" });
}
catch (Exception ex)
{
return Json(new { response = ex.Message });
}
}
}
It works fine in development, but not in production environment.