tldr;1. Obtain a domain (and register it to a name server)2. Obtain a mail server3. Update domain MX record, following the mail server4. test+ Add DKIM settings and record 1. Obtain a domain (and register it to a name server)You can purchase domain directly from the domain registry services, or DNS services*for dani.is, I used iceland domain registry - https://www.isnic.is/en**for other domains ..
