Which Email Services Does Shift Support?

Great question! Shift currently supports Gmail, Outlook (including Hotmail), Office 365, Google Inbox, and includes the Yahoo Mail, iCloud Mail, and Zoho Mail apps for Shift Advanced users. 

Shift Supports Gmail, Outlook, and Office 365

If you would like to add a different kind of account check out the support article:

How to add unsupported emails in Shift