Sender authentication
Internet Security. The process that shows Internet service providers (ISPs) that you gave your mailbox provider permission to send emails on your behalf. To set up sender authentication, add DNS records to your hosting service.
This authentication involves both domain authentication and link branding.
(warning)
Sender authentication, not whitelabel
You might encounter the term whitelabel. The term sender authentication replaces that term and eliminates any potential racial or cultural connotations associated with the earlier term.