How to add an email account as an inbox in Front (not Gmail or Office 365)
Go into your Settings, select Inboxes, and Add a team inbox or Add an individual inbox.
Enter the email address and the name you want to appear for your team inbox. Then click Next.
Decide who has access to this inbox, and click Create inbox. Step 5
Your inbox should now be set up. You will soon want to redirect your emails from that account to Front. You can do that now, or later. When you're ready, please check out the How to redirect emails from Outlook to Front article for instructions.