Setup your own email EE4

Hi there,

I’m new to EE and used EE4 + DigitalOcean to create my Wordpress site. Is there any way to create with EE4 ? All I can find is old command that not supported by current v4. And because of everything’s running on Docker ( Which I have zero knowledge ), does normal DKIM Postfix Dovecot… +Roundcube setup works ?

Thank you in advanced.