In qualche modo ho risolto, posto qui il risultato...
Qui il form html:
<form method="post" action="Anmeldung-erfolgreich.php" style="width: 435px; padding: 10px; font-family: 'Gill Sans MT'; font-size: 10pt;">
	<div class="Sfondo-Form">
	<fieldset class="fieldset-A">
	<div class="TXT-Form">Name</div>
	<div class="campo">
	<input name="name" type="text" size="40" maxlength="40" class="input-A"/></div>
	</fieldset>
<div class="riga-vuota-13"></div>
	<fieldset class="fieldset-A">
	<div class="TXT-Form">Vorname</div><div class="campo">
	<input name="vorname" type="text" size="40" maxlength="40" class="input-A"/></div>
	</fieldset>
<div class="riga-vuota-13"></div>
	<fieldset class="fieldset-A">
	<div class="TXT-Form">Geburtsdatum</div><div class="campo">
	<input name="geburtsdatum" type="text" size="40" maxlength="40" class="input-A"/></div>
	</fieldset>
<div class="riga-vuota-13"></div>
	<fieldset class="fieldset-A">
	<div class="TXT-Form">Muttersprache</div><div class="campo">
	<input name="muttersprache" type="text" size="40" maxlength="40" class="input-A"/></div>
	</fieldset>
<div class="riga-vuota-13"></div>
<div class="riga-vuota-13"></div>
<div class="riga-vuota-13"></div>
	<fieldset class="fieldset-A">
	<div class="TXT-Form">PLZ</div><div class="campo">
	<input name="plz" type="text" size="20" maxlength="5" class="input-A"/></div>
	</fieldset>
<div class="riga-vuota-13"></div>
	<fieldset class="fieldset-A">
	<div class="TXT-Form">Stadt</div><div class="campo">
	<input name="stadt" type="text" size="40" maxlength="40" class="input-A"/></div>
	</fieldset>
<div class="riga-vuota-13"></div>
	<fieldset class="fieldset-A">
	<div class="TXT-Form">Festnetz</div><div class="campo">
	<input name="festnetz" type="text" size="40" maxlength="40" class="input-A"/></div>
	</fieldset>
<div class="riga-vuota-13"></div>
	<fieldset class="fieldset-A">
	<div class="TXT-Form">Mobil</div><div class="campo">
	<input name="mobil" type="text" size="40" maxlength="40" class="input-A"/></div>
	</fieldset>
<div class="riga-vuota-13"></div>
	<fieldset class="fieldset-A">
	<div class="TXT-Form">Email</div><div class="campo">
	<input name="email" type="text" size="40" maxlength="40" class="input-A"/></div>
	</fieldset>
<div class="riga-vuota-13"></div>
<div class="riga-vuota-13"></div>
<div class="riga-vuota-13"></div>
	<fieldset class="fieldset-B">
	<div class="TXT-Form"></div>
	<div class="campo-TXT">Ich melde mich für folgenden Kurs an:</div>
	<select name="kurswahl" class="select-TXT">
<option selected class="select-TXT-I">  auswählen</option>
<option>  Anfänger ohne Vorkenntnisse (Gruppe A)</option>
<option>  Anfänger ohne Vorkenntnisse (Gruppe B)</option>
<option>  Anfänger mit Vorkenntnissen (Gruppe A)</option>
<option>  Anfänger mit Vorkenntnissen (Gruppe B)</option>
<option>  Grundstufe</option>
<option>  Mittelstufe</option>
<option>  Konversation</option>
<option>  Wirtschaftsitalienisch</option>
<option>  Italienisch in der Küche</option>
</select>
<div class="riga-vuota-13"></div>
<div class="riga-vuota-13"></div>
<div class="riga-vuota"></div>
<div class="riga-vuota"></div>
<input type="submit" class="abschick" value="Anmeldung abschicken" />
	</fieldset>
</div>
</form>
-------------------------------
Qui il file php di rimando:
<?php
$name= $_POST['name']; 
$vorname= $_POST['vorname']; 
$geburtsdatum = $_POST['geburtsdatum ']; 
$muttersprache = $_POST['muttersprache ']; 
$plz= $_POST['plz']; 
$stadt= $_POST['stadt']; 
$festnetz= $_POST['festnetz']; 
$mobil= $_POST['mobil']; 
$kurswahl= $_POST['kurswahl']; 
$email = $_POST['email']; 
$to = "miglio@azzurro-deutschland.de"; 
$testo = stripslashes($testo); 
$email = stripslashes($email); 
$subject = "Kursanmeldung"; 
$message = "Cognome: $name, Nome: $vorname, Data di nascita: $geburtsdatum, Madrelingua: $muttersprache, PLZ: $plz, Stadt: $stadt, Telefono fisso: $festnetz, Cellulare: $mobil, Corso scelto: $kurswahl, Indirizzo Email: $email" ; 
mail($to, $subject, $message); 
header("location: http://www.azzurro-deutschland.de/Anmeldung-erfolgreich.php");
exit;
?>