program/steps/mail/func.inc
@@ -1436,6 +1436,7 @@ 'Subject' => rcube_label('receiptread') . ': ' . $message->subject, 'Message-ID' => sprintf('<%s@%s>', md5(uniqid('rcmail'.mt_rand(),true)), $RCMAIL->config->mail_domain($_SESSION['imap_host'])), 'X-Sender' => $identity['email'], 'References' => trim($message->headers->references . ' ' . $message->headers->messageID), ); if ($agent = $RCMAIL->config->get('useragent'))
