to apply the patch you must replace lines 369 - 372 of /environment/classes/mail/MailUtilities.class.php
$cc = trim($cc, " ,");
$bcc = trim($bcc, " ,");
if ($cc != '') $mailer->addCc(explode(",", $cc));
if ($bcc != '') $mailer->addBcc(explode(",", $bcc));
for these ones:
$ccArr = explode(",", $cc);
foreach ($ccArr as $k => $v) {
if (trim($v) == '') unset($ccArr[$k]);
}
if(count($ccArr)>0) $mailer->addCc($ccArr);
$bccArr = explode(",", $bcc);
foreach ($bccArr as $k => $v) {
if (trim($v) == '') unset($bccArr[$k]);
}
if(count($bccArr)>0) $mailer->addBcc($bccArr);