Email Server not responding [duplicate]

i downloaded a website theme , and started working on it , but there is an error with contact form , i added method and action , but still... I tried fixing it and all , but not working . Can anyone help me ?

here is the form code

<div class="row">
                <div class="col-md-12">
                    <div class="contact_form">
                        <div id="message"></div>
                        <form id="contactForm" name="sentMessage" novalidate="validate" method="POST" action="mail/contact_me.php">
                            <div class="row">
                                <div class="col-md-6">
                                    <div class="form-group">
                                        <input class="form-control" id="name" type="text" placeholder="Your Name" required="required" data-validation-required-message="Please enter your name.">
                                        <p class="help-block text-danger"></p>
                                    </div>
                                    <div class="form-group">
                                        <input class="form-control" id="email" type="email" placeholder="Your Email" required="required" data-validation-required-message="Please enter your email address.">
                                        <p class="help-block text-danger"></p>
                                    </div>
                                    <div class="form-group">
                                        <input class="form-control" id="phone" type="tel" placeholder="Your Phone" required="required" data-validation-required-message="Please enter your phone number.">
                                        <p class="help-block text-danger"></p>
                                    </div>
                                </div>
                                <div class="col-md-6">
                                    <div class="form-group">
                                        <textarea class="form-control" id="message" placeholder="Your Message" required="required" data-validation-required-message="Please enter a message."></textarea>
                                        <p class="help-block text-danger"></p>
                                    </div>
                                </div>
                                <div class="clearfix"></div>
                                <div class="col-lg-12 text-center">
                                    <div id="success"></div>
                                    <button id="sendMessageButton" class="sim-btn btn-new from-middle animated" data-text="Send Message" type="submit">Send Message</button>
                                </div>
                            </div>
                        </form>
                    </div>
                </div><!-- end col -->
            </div><!-- end row -->
        </div><!-- end container -->
    </div><!-- end section -->

PHP Code

// Check for empty fields
if(empty($_POST['name'])      ||
   empty($_POST['email'])     ||
   empty($_POST['phone'])     ||
   empty($_POST['message'])   ||
   !filter_var($_POST['email'],FILTER_VALIDATE_EMAIL))
   {
   echo "No arguments Provided!";
   return false;
   }

$name = strip_tags(htmlspecialchars($_POST['name']));
$email_address = strip_tags(htmlspecialchars($_POST['email']));
$phone = strip_tags(htmlspecialchars($_POST['phone']));
$message = strip_tags(htmlspecialchars($_POST['message']));

// Create the email and send the message
$to = 'davidmitrevski04@gmail.com'; // Add your email address inbetween the '' replacing yourname@yourdomain.com - This is where the form will send a message to.
$email_subject = "Website Contact Form:  $name";
$email_body = "You have received a new message from your website contact form.\n\n"."Here are the details:\n\nName: $name\n\nEmail: $email_address\n\nPhone: $phone\n\nMessage:\n$message";
$headers = "From: davidmitrevski00@yahoo.com\n"; // This is the email address the generated message will be from. We recommend using something like noreply@yourdomain.com.
$headers .= "Reply-To: $email_address";   
mail($to,$email_subject,$email_body,$headers);
return true;         
?>

This is the code , remember its a downloaded theme i havent touched it a lot , i just added logo and favicon....