<?php
$MBox = array(
    // (email, pass, host)
    array('boite1@admin-serv.net', 'pass1', 'test'),
    array('boite2@admin-serv.net', 'pass2', 'localhost'),
    );
foreach ($MBox as $m) {
    $mbox = imap_open('{' . $m[2] . ':143}INBOX', $m[0], $m[1]);
    $result = imap_search($mbox, 'UNSEEN');
    echo $m[0] . ' - ' . count($result) . '<br />';
}
?>