You may integrate with any preferred mail provider using SMTP, just fill in your SMTP details during the installation or after (via Control Panel).

However, you may choose to use the built-in mail provider on your server (SendMail), simply select this option during or after installation. This is definitely not recommended.

The Email From Address must be of your own domain name, e.g and it requires your domain name verification at your email provider. Without this verification, you will not be able to send emails.