How to setup phpmailer, smtp, and digitalocean (ubuntu 18.04)

Hello world,

I have developed a web app and I need to send emails from app to users for account confirmation, password reset, info, etc.

The app is written in PHP and uses phpmailer to send emails.

My question is, how can I setup smtp in digital ocean? how can I define my system’s email address (e.g. info@example.com)?

Any kind of hint would be very appreciated.

Thanks