$host = "smtp.gmail.com";
$user = "message@mindings.com";
$pass = "mindings";
$mbox = imap_open("{$host:587/novalidate-cert}", $user, $pass);

echo "<h1>Mailboxes</h1>\n";
$folders = imap_listmailbox($mbox, "{smtp.gmail.com:587}", "*");

if ($folders == false) {
echo "Call failed<br />\n";
} else {
foreach ($folders as $val) {
echo $val . "<br />\n";
}
}

echo "<h1>Headers in INBOX</h1>\n";
$headers = imap_headers($mbox);

if ($headers == false) {
echo "Call failed<br />\n";
} else {
foreach ($headers as $val) {
echo $val . "<br />\n";
}
}

imap_close($mbox);