Create email setup

Situation
Hi,

I tried to create a patient by registering in patient portal. However, I am getting an error message stating an error message showing 'Email Error: Invalid address: (From): root@localhosy

Can anyone help me how to setup email stmp in openemr?

Thank you

OpenEMR Version
I’m using OpenEMR version 6

Browser:
I’m using: Chrome

Operating System
I’m using: Windows 10