Emails missing after mbox import
I have around 10.500 emails and 3000 sent messages in my Mac 10.7.5.
I tried to export and import the inbox and sent mbox into Mac Sierra, as Apple Mail and as Mbox.
After import, I still miss 4000 emails. It's like it will only import emails to 2013 and not earlier.
MacBook Pro (13-inch Mid 2012), iOS 10.2.1