PHP's Mail() not working on 000webhost [duplicate]

This question already has an answer here:

• PHP mail form doesn't complete sending e-mail 13 answers

I'm trying to mail some information from a contact form via this code

<?php
// 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 = $_POST['name'];
$email_address = $_POST['email'];
$phone = $_POST['phone'];
$message = $_POST['message'];

// Create the email and send the message
$to = 'Mymail@mydomain.com'; //
$email_subject = "Contacto web: $name ";
$email_body ="$email_address\n\nPhone: $phone\n\nMessage:\n$message";
$headers = "from: Noreply@mydomain.com\n"; 
$headers .= "Reply-To: $email_address"; 
mail($to,$email_subject,$email_body,$headers);          
?>

the mail seems to be coming out but i'm getting nothing. i'm using HTMl and js for validations.