When using Digital Ocean and Flexible IPs with Plesk, outbonds emails might not be sending properly. This is an issue related to the IP address used by postfix.
You may have a hard time to configure Plesk to be used as a primary nameserver. However this could be useful to have a full control of the server in a single place.
The following recommandations are the result of many reading about GDPR and ePrivacy. They should be use a base for your own reflexion and do not replace a lawyer opinion.
À passer autant de temps sur divers projets, autant en développement web qu'en programmation interactive, on finit tôt ou tard par avoir besoin de connaissances de base avec le terminal.