Practical guide. Use only the connection and DNS details provided when your account is activated; .example domains are illustrative.
Choose and keep your domain
Connect a domain you already own. Domain registration and renewal are separate services.
Size users and addresses
A mailbox has its own access and storage. An alias delivers to an existing mailbox; it is not another account.
Verify before activation
Verify domain ownership and review MX, SPF, DKIM and DMARC records to configure email.