How can I split my inboxes?
You can have dedicated tabs for each connected Mailbox.
Creating dedicated tabs allows for an enhanced ability to monitor emails and inboxes as they are refreshed in real-time.
In Inbox view click the '+' icon to create a new tab.
In the new tab, click on the filter icon on the top left-hand side of the tab menu.
Look for 'Inbox' filter and select the email address/addresses that you would like to have filtered.
Rename and bookmark created tabs.