program/steps/mail/show.inc
@@ -43,7 +43,7 @@ } // calculate Etag for this request $etag = md5($MESSAGE['UID'].$IMAP->get_mailbox_name().session_id().($PRINT_MODE?1:0)); $etag = md5($MESSAGE['UID'].$IMAP->get_mailbox_name().session_id().intval($MESSAGE['headers']->mdn_sent).intval($PRINT_MODE)); // allow caching, unless remote images are present if ((bool)get_input_value('_safe', RCUBE_INPUT_GET))