Apple Mail not showing mails in Smart Mailbox after upgrading to 10.15.2 There were around 500 mails in my Smart Mailbox. I upgraded from Catalina 10.15.0 to 10.15.2. Now it is showing only 3 mails.

Inbox folder shows all the mails. They just don't appear in "Smart Mailbox".

Smart Mailbox settings



Discrepancy in mails



Inbox shows 503 while Smart mailbox shows only 3.
Steps to solve it:


Goto to "Inbox" in mailboxes
Press "Cmd + A" to select all messages
Click Message > "Move to Google Again"


This rebuilds all the "Smart Mailboxes".