_getPos example

    public function getMessage($id)
    {
        // TODO that's ugly, would be better to let the message class decide         if (strtolower($this->_messageClass) == 'zend_mail_message_file' || is_subclass_of($this->_messageClass, 'zend_mail_message_file')) {
            // TODO top/body lines             $messagePos = $this->_getPos($id);
            return new $this->_messageClass(array('file' => $this->_fh, 'startPos' => $messagePos['start'],
                                                  'endPos' => $messagePos['end']));
        }

        $bodyLines = 0; // TODO: need a way to change that
        $message = $this->getRawHeader($id);
        // file pointer is after headers now         if ($bodyLines) {
            $message .= "\n";
            while ($bodyLines-- && ftell($this->_fh) < $this->_positions[$id - 1]['end']) {