Problème avec mon formulaire

if(isset($_GET) && isset($_GET['name']) && isset($_GET['mail']) && isset($_GET['phone']) && isset($_GET['title']) && isset($_POST['subject']) && isset($_GET['pays'])){
.......

<form method="post" action="">
	<p class="text_10_formulaire">
	<label>Enter your name</label> <input type="text" name="name" id="name" class="box_contact"/><br />
	<label>Enter your E-mail</label> <input type="text" name="mail" id="mail" class="box_contact"/><br />
	<label>Enter your Telephone number</label> <input type="text" name="phone" id="phone" class="box_contact"/><br />
	<label>Message subject</label> <input type="text" name="title" id="title" class="box_contact"/><br />
	<label for="subject">Enter your message</label><br />
	<textarea name="subject" id="subject" rows="4" cols="60" class="box_contact"/></textarea><br />
	<label for="pays">Where are you ?</label><br />
       <select name="pays" id="pays" tabindex="40">
           <optgroup label="Europe">
               <option value="france">France</option>
			   <option value="germany">Germany</option>
               <option value="italy">Italy</option>
			   <option value="spain">Spain</option>
               <option value="united kingdom" selected="selected">United Kingdom</option>
           </optgroup>
           <optgroup label="America">
               <option value="canada">Canada</option>
               <option value="usa">USA</option>
           </optgroup>
           <optgroup label="Asia">
               <option value="china">China</option>
               <option value="japan">Japan</option>
           </optgroup>
		   <optgroup label="Other">
		   <option value="other">Other country</option>
		   </optgroup>
       </select>
	   <p>
       <input type="submit" value="Submit"> <input type="reset" value="Reset" />
   </p>	
</form>


<?php
if(isset($_POST) && isset($_POST['name']) && isset($_POST['mail']) && isset($_POST['phone']) && isset($_POST['title']) && isset($_POST['subject']) && isset($_POST['pays'])){
	extract($_POST);
	if(!empty($name) && !empty($mail) && !empty($phone) && !empty($title) && !empty($subject) && !empty($pays)){
		$destinataire="maxdel26@gmail.com";
		$sujet="Question ?";
		$message="Une question est arrivée \n
		Nom : $name \n
		Title : $title \n
		Mail : $mail \n
		Message : $subject \n
		Phone : $phone \n
		Country : $pays";
		//$entete="From: $name \n Reply-To: $mail";
		//mail($destinataire,$sujet,$message,$entete);
		//echo "Le mail a bien été envoyé.";
		echo $message;
	}
		else{
		echo "Tous les champs n'ont pas été rempli.";
	}
}
?>