protected function addInlineImagesToMessage(\Swift_Message &$message, $fieldhtml)
{
$regex = '~data:[^;]+;[A-Za-z0-9]+,[^")\'\\s]+~';
preg_match_all($regex, $fieldhtml, $treffers, PREG_OFFSET_CAPTURE);
$treffers = $treffers[0];
foreach ($treffers as $treffer) {
$trefferexpl = explode(',', $treffer[0], 2);
$data = explode(';', $trefferexpl[0]);
$data = explode(':', $data[0]);
$mimetype = $data[1];
$decoded = base64_decode($trefferexpl[1]);
$image = new \Swift_Image();
$image->setBody($decoded, $mimetype);
$cid = $message->embed($image);
$fieldhtml = str_replace($treffer[0], $cid, $fieldhtml);
}
$message->setContentType("text/html")->setBody($fieldhtml, 'text/html');
return true;
}