Código PHP:
<?php
$mail='[email protected]';
$name = $_POST['name'];
$email = $_POST['email'];
$message = $_POST['message'];
$thank="thanks.html";
$message = "
Name: " .$name."
E-mail: " .$email."
Message: " .$message."";
if (mail($mail,$email,$message, "From: $email"))
Header ("Location: $thank");
?>