Ho scaricato il pacchetto.
Innanzittutto, modifica form.html in form.php. Dopo aver fatto questo passaggio, apri il file e modifica il contenuto con questo codice, modificando i campi che iltuoindirizzoemail , Il testo dell'oggetto e, se vuoi, anche il body

Codice PHP:
<?php
    
if (isset($_POST['element_1_1']) && isset($_POST['element_1_2']) && isset($_POST['element_1_3']) && isset($_POST['element_3']) && isset($_POST['element_4_1']) && isset($_POST['element_5']))
    {
        
$date = (int) $_POST['element_1_1'] . "/".(int) $_POST['element_1_2'] . "/".(int) $_POST['element_1_3'];
        
$email strip_tags(addslashes($_POST['element_3']));
        
$referente strip_tags(addslashes($_POST['element_4_1']." ".$_POST['element_4_2']));
        
$citta strip_tags(addslashes($_POST['element_5']));
        
$to "iltuoindirizzoemail";
        
$subject "Il testo dell'oggetto della mail";
        
        
$body "
            Data Invio : "
.$date." \n
            E-Mail : "
.$email." \n
            Referente : "
.$referente." \n
            Città : "
.$citta." \n
        "
;
        
$headers "From: $to \n
           "
;
            
            
if(
mail($to$subject$body$headers))
{
 
//modificate il messaggio a vostro piacere
 
echo ("Mail inviata con successo");

}

//nel caso ci fossero problemi
else
{
echo (
"Si è verificato un errore durante l'invio.");

    }
?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Untitled Form</title>
<link rel="stylesheet" type="text/css" href="view.css" media="all">
<script type="text/javascript" src="view.js"></script>
<script type="text/javascript" src="calendar.js"></script>
</head>
<body id="main_body" >
    
    [img]top.png[/img]
    <div id="form_container">
    
        <h1><a>Untitled Form</a></h1>
        <form id="form_399422" class="appnitro"  method="post" action="">
                    <div class="form_description">
            <h2>Untitled Form</h2>
            

This is your form description. Click here to edit.</p>
        </div>                        
            <ul >
            
                    <li id="li_1" >
        <label class="description" for="element_1">Date Tee Time </label>
        <span>
            <input id="element_1_1" name="element_1_1" class="element text" size="2" maxlength="2" value="" type="text"> /
            <label for="element_1_1">MM</label>
        </span>
        <span>
            <input id="element_1_2" name="element_1_2" class="element text" size="2" maxlength="2" value="" type="text"> /
            <label for="element_1_2">DD</label>
        </span>
        <span>
             <input id="element_1_3" name="element_1_3" class="element text" size="4" maxlength="4" value="" type="text">
            <label for="element_1_3">YYYY</label>
        </span>
    
        <span id="calendar_1">
            [img]calendar.gif[/img]    
        </span>
        <script type="text/javascript">
            Calendar.setup({
            inputField     : "element_1_3",
            baseField    : "element_1",
            displayArea  : "calendar_1",
            button         : "cal_img_1",
            ifFormat     : "%B %e, %Y",
            onSelect     : selectDate
            });
        </script>
         
                <li id="li_3" >
        <label class="description" for="element_3">Email </label>
        <div>
            <input id="element_3" name="element_3" class="element text medium" type="text" maxlength="255" value=""/> 
        </div><p class="guidelines" id="guide_3">[size="1"]Please fill form using valid email address/inserisci un valido indirizzo, servirà per conttattarti per eventuali problemi[/size]</p> 
                <li id="li_4" >
        <label class="description" for="element_4">Nome e Cognome  </label>
        <span>
            <input id="element_4_1" name= "element_4_1" class="element text" maxlength="255" size="8" value=""/>
            <label>First</label>
        </span>
        <span>
            <input id="element_4_2" name= "element_4_2" class="element text" maxlength="255" size="14" value=""/>
            <label>Last</label>
        </span> 
                <li id="li_5" >
        <label class="description" for="element_5">città </label>
        <div>
            <input id="element_5" name="element_5" class="element text medium" type="text" maxlength="255" value=""/> 
        </div> 
        
            
                    <li class="buttons">
                <input type="hidden" name="form_id" value="399422" />
                
                <input id="saveForm" class="button_text" type="submit" name="submit" value="Submit" />
        
            [/list]
        </form>    
        <div id="footer">
            Generated by [url="http://www.phpform.org"]pForm[/url]
        </div>
    </div>
    [img]bottom.png[/img]
    </body>
</html>
Se si verificano problemi, non esitare pure a chiedere