<?php
include_once 'MG_Email.php';
$mailgun_public_api_key = 'your_mailgun_public_key';
$mg_email = new MG_Email($mailgun_public_api_key);
$email = '[email protected]';
if ($mg_email->is_valid($email)) {
    echo $email.' is valid';
}
else {
    echo $email.' is invalid.';
    if ($mg_email->spell_check)
        echo ' Do you mean '.$mg_email->spell_check.'?';
}
?>