On the View tab, select View settings.
Select Accounts > Email accounts.
To add an account, select Add Account, select a suggested account from the dropdown menu or enter a different email address, and select Continue.
If prompted, enter your password for the account and select Done.
Manage your email accounts
On the View tab, select View settings.
Select Accounts > Email accounts.
Add new accounts or manage your added accounts.
When you're finished, close the Settings window.