External e-mail domain
What is an External e-mail domain?
And external e-mail domain is an e-mail address that is associated with the company you are working for. For example, a person working for Shell Global Solutions would have an e-mail such as ‘firstname.lastname@example.org’. This shows that the person who you are e-mailing is an employee of the Shell Global Solutions.
This helps people recognize the authorization of the person, as you can’t have an external e-mail domain unless it has been authorized by the company you are working for. It automatically makes you a trusted person if you are working for a good multinational organization, as multinationals do not hire people who are not worth their criteria.