<?
$mailuser="shop@site.su";
$mailpass="password";
$mailhost="{imap.yandex.ru:993/imap/ssl/novalidate-cert}INBOX";
$mailbox = imap_open($mailhost,$mailuser,$mailpass) or die("<br />\nFAILLED! ".imap_last_error());
$emails = imap_search($mailbox,'ALL');
$output = '';
rsort($emails);

$num = 0;

foreach($emails as $email_number) {
    $num++;
    $overview = imap_fetch_overview($mailbox,$email_number,0);
        echo '<pre>';
        var_dump($overview[0]);
        echo '</pre>';
    $decode_subj = mb_decode_mimeheader($overview[0]->subject);
    $u_date = $overview[0]->udate;
    if ($num==10) break;
}

imap_close($mailbox);