How to add Multiple email accounts to Mail Inbox on iMac?
how do I put two email accounts into one Inbox?
[Re-Titled by Moderator]
iMac 27″ 5K, macOS 10.15
You can add multiple email accounts in an "All Inboxes" in Mail's Favorites sidebar section:
You only need to click on the All Inboxes icon to get the email from all accounts.
You put al of them in the Favorites section by clicking on the "+" button to the right of the Favorites heading like I did with the Archive mailboxes here: