Nov 10, 2018

Solution: Wrong Number of Unread Emails in Gmail

Sometimes gmail shows a seemly wrong number of unread emails on the left side of the page in labels part.
You can type this in the search box:

   label:labelname is:unread

It is because the emails with reply (or multiple reply exchange) that the first email is read (but replies are still unread) are not listed and counted as unread emails.