Creating email accounts under one of your domain names makes your website look more professional by having a custom email. You can also create a few different email accounts in different departments to build scale and trust with your clients for your business.
To create an email account:
Note, you can forward emails from this new mailbox to another mailbox by clicking the "Forward emails to a different mailbox" checkmark and then inserting the email of the mailbox account you want to forward to.