program/steps/mail/func.inc
@@ -1425,7 +1425,7 @@ 'From' => $sender, 'To' => $message->headers->mdn_to, 'Subject' => rcube_label('receiptread') . ': ' . $message->subject, 'Message-ID' => sprintf('<%s@%s>', md5(uniqid('rcmail'.rand(),true)), $RCMAIL->config->mail_domain($_SESSION['imap_host'])), 'Message-ID' => sprintf('<%s@%s>', md5(uniqid('rcmail'.mt_rand(),true)), $RCMAIL->config->mail_domain($_SESSION['imap_host'])), 'X-Sender' => $identity['email'], 'Content-Type' => 'multipart/report; report-type=disposition-notification', );