E-mail form headers?

1

Hey! I’m new with php and i made a little e-mail form. I can’t get the headers working. When an e-mail has a arrived, I want the sender’s email address to show up. Sorry my bad english. Here is the code:

<?php 
if(isset($_POST['submit'])) { 
$to = "myemail@mail.com"; 
$subject = "Testing"; 
$name_field = $_POST['name'];
$address_field = $_POST['address']; 
$city_field = $_POST['city'];
$phone_field = $_POST['phone']; 
$email_field = $_POST['email']; 

$headers = 'MIME-Version: 1.0' . "
";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "
";
$headers .= 'To: My Name <myemail@mail.com>' . "
";
$headers .= 'From: $email_field' . "
";

$body = "Name: $name_field
 Address: $address_field
 City: $city_field

Phone: $phone_field
 Email: $email_field
";

echo "Data has been submitted to $to!"; 
mail($to, $subject, $body, $headers); 
} else { 
echo "Viestin lähettäminen ei onnistunut"; 
} 
?>

Please help me, i’m lost!