Mac Mail Smart mailbox reports phantom Unread messages?
Using Catalina 10.15.7.
Smart Mailbox whose only filter is "unread", shows count of 2 Unread messages, but none in display window.
A second Smart Mailbox, whose filter is only a narrow receipt date, shows an unread message count of 2, but no unread messages.
I've rebuilt the mailboxes and deleted the Envelope Index files and allowed the system to rebuild.
Any ideas what I can try next?
Mac mini, macOS 10.15