To enable message-flag notifications, you must configure the following configutil parameters:
local.store.notifyplugin.MsgFlags
local.store.notifyplugin.*.MsgFlags.enable
The first MsgFlags parameter enables the IMAP server and message store to identify and track the changing values of the status flags so that this information can be delivered in notification messages.
This parameter applies to all notification plug-ins. Therefore, you must enable the parameter if any notification plug-in uses message-flag notifications. If no plug-in uses message-flag notifications, be sure that this parameter is disabled (its default value).
The second parameter, *.MsgFlags.enable, allows message-flag notifications to be sent for a particular plug-in library.
You must configure both parameters to enable notifications for message flags.