A domain is your site’s address; DNS records point it to your server and mail. Register it to the real owner, keep auto-renewal on, and change DNS carefully: one wrong record can take a site and its e-mail offline.
What to check
- Keep registrar ownership and recovery e-mail under your control.
- Record existing DNS, including MX, SPF, DKIM and DMARC.
- Plan TTL changes and verify website and mail after a move.