embedded images in email

[Guest]

calss email (classes/email.php) can embed images in e-mail body when HTML-email enabled ( fuctions find_html_images etc).

in function add_html there are 3d parameter (NULL by default) - directory in which search image and embed image if image file exist. But code in function tep_mail (in general.php both for catalog and admin)

if (EMAIL_USE_HTML == 'true') {

$message->add_html($email_text, $text);

} else {

$message->add_text($text);

}

add_html called without image dir. If change code to

...

$message->add_html($email_text, $text,DIR_WS_IMAGES);

...

images work OK.

Question is - it's bug in code or this feature disabled and if disabled then why (security bugs etc)?