In Zoho Mail it says I have 8 unread messages in the sent folder.

If I right click, the option to mark the Sent folder Read is greyed out / unselectable.

I can not filter mail by read/unread in the sent folder (no option for that)

If I search only Unread mail in the sent folder the results include Read mail items.

It seems like its impossible to mark these Unread mail as read, or even to find them in the sent folder. Is there some thing I am missing here?

BTW I am using the old version of Zoho Mail...