function mail_on_page_load()
{
    //check if have outbox mails
    $usu = logged_user();
    $accounts = MailAccounts::instance()->getMailAccountsByUser($usu);
    $account_ids = array();
    foreach ($accounts as $acc) {
        $account_ids[] = $acc->getId();
    }
    if (count($account_ids) == 0) {
        return;
    }
    $accounts_sql = " AND account_id IN (" . implode(',', $account_ids) . ")";
    $user_pg_ids = $usu->getPermissionGroupIds();
    if (count($user_pg_ids) == 0) {
        return;
    }
    $permissions_sql = " AND EXISTS (SELECT sh.group_id FROM " . TABLE_PREFIX . "sharing_table sh WHERE sh.object_id=o.id AND sh.group_id IN (" . implode(',', $user_pg_ids) . "))";
    $conditions = array("conditions" => array("`state` >= 200 AND (`state`%2 = 0) AND `archived_on`=0 AND `trashed_on`=0 {$accounts_sql} {$permissions_sql} AND `created_by_id` =" . $usu->getId()));
    $outbox_mails = MailContents::findAll($conditions);
    if ($outbox_mails != null) {
        if (count($outbox_mails) >= 1) {
            $arguments = array("conditions" => array("`context` LIKE 'mails_in_outbox%' AND `contact_id` = " . $usu->getId() . ";"));
            $exist_reminder = ObjectReminders::find($arguments);
            if (!(count($exist_reminder) > 0)) {
                $reminder = new ObjectReminder();
                $minutes = 0;
                $reminder->setMinutesBefore($minutes);
                $reminder->setType("reminder_popup");
                $reminder->setContext("mails_in_outbox " . count($outbox_mails));
                $reminder->setObject($usu);
                $reminder->setUserId($usu->getId());
                $reminder->setDate(DateTimeValueLib::now());
                $reminder->save();
            }
        }
    }
}