ToolKit_OptimizeSummaryMails=Yes (default) ensures that summary notifications are created for original senders and recipients only. The summary notification is processed by the MailGrabber s that it can be forwarded or redirected by iQ.Suite Clerk. If ACL groups and roles are to be entered as recipients as well, the parameter must remain set to YES. ToolKit_OptimizeSummaryMails=No ensures that summary notifications are also created for forwarded or redirected emails and that emails are not processed by the Grabber.