Hi there @tristansalonga,

Note that DigitalOcean does not provide a managed mail server solution out of the box. In order for you to use DigitalOcean as your email provider, you need to actually set up a Droplet and configure it as your email server. Then you can use that Droplet’s IP address and set up your DNS so that you would receive emails.

You can take a look at this article here on how to configure a mail server using Postfix, Dovecot, MySQL and SpamAssassin:

https://www.digitalocean.com/community/tutorials/how-to-configure-a-mail-server-using-postfix-dovecot-mysql-and-spamassassin

Hope that this helps!
Regards,
Bobby