Create a mailbox domain
Create domain for the partner_id
Create domain for the partner_id
Bearer authentication of the form Bearer <token>, where token is your auth token.
The domain name, such as mail.mycompany.com. Can contain only alphanumeric characters (A..Z a..z 0..9), dots (.), and hyphens (-). Each segment of the domain name must start and end with either a letter or a digit.