Neodesílá mail

<div>
    <form action="poptavka.php" method="post"></br>
    <input type="text" size="40" name="jmeno" value="jméno"> </br>
    <input type="text" size="40" name="prijmeni" value="příjmení"><br>
    <input type="text" size="40" name="telefon" value="telefon"><br>
    <input type="text" size="40" name="email" value="email"><br><br>
    <input type="text" size="40" name="predmet" value="předmět"><br> 
    <br><a href="#" target="v"><input type="submit" value="odeslat"></a>
    </form>
  </div>

<?php

$to = "kpc@hu.cz";
$subject = ".$_POST["predmet"].";

$headers  = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/text; charset=utf-8' . "\r\n";
$headers .= "From: ". $_POST["email"] .">\r\n";
$headers .= "Reply-To: " . $_POST["email"] . "\r\n";
$headers .= "Return-path: " . $_POST["email"];

$message .="Jméno:".$_POST["jmeno"]."\r\n";
$message .="Příjmení:".$_POST["prijmeni"]."\r\n";
$message .="Email:".$_POST["email"]."\r\n";
$message .="Telefon:".$_POST["telefon"]."\r\n";

$message .="Předmět:".$_POST["predmet"]."\r\n";

mail($to, $subject, $message, $headers);

?>