Not seeing a lot of emails
In Mac mail, when I use the search box very often among the returns I will see unread emails. I have a smart mailbox set up to show all unread emails. There's nothing in there. Also, if I select all mailboxes in the sidebar, I see a lot of unread emails. This is a big problem. I haven't been able to figure out an answer for it. Would really appreciate some help.
Mac mini, macOS 15.7