<form class="contact-form" action="contactform.php" method="post">

      <input type="text" name="name" placeholder="full name">

      <input type="text" name="mail" placeholder="your email">

      <input type="text" name="subject" placeholder="subject">

      <textarea name="message" placeholder="message"></textarea>

      <button type="submit" name="submit">SEND MAIL</button>

</form>   

​

<?php

​

if  (isset ($_POST_POST['submit'])) {

    $name = $_POST ['name'];

    $subject = $_POST['subject'];

    $mailfrom = $_POST['mail'];

    $message = $_POST['message'];

​

    $mailTo = "mac@alohacircleislandtour.com";

    $headers = "From: ".$mailFrom;

    $txt = "You have received an e-mail from ".$name.".\n\n".$message;

​

    mail($mailTo, $subject, $txt, $headers);

    header("Location: index.php?mailsend");

}