SHEET 01 / MAILBOX
A business mailbox starts with control of the domain.
The address is only the visible end. Behind it are the domain account, DNS records, mail provider, authentication and recovery access.
01
Choose addresses by role
Create named mailboxes for people and role addresses for functions that must survive staff changes.
02
Keep ownership with the business
The domain, provider account, billing and recovery methods should remain accessible to more than one authorised person.
03
Publish the required records
Set the provider MX records exactly, then configure SPF, DKIM and DMARC for the services that actually send mail.