The old text based mailstats is now fully html based, with graphs as well as the league tables and the hourly email statistics table.
It also has a panel in the new Server Manager with access to previous days stats, plus configuration for mailstats things as well as spamassassin and RBLs etc.
It keeps a summary of each email processed in the MariaDB, and will extract the actual transactions from the journal if required.
Here's a few more screen shots:

