Add external contacts to my distribution group

When you need people outside your organization to receive emails, add them as external contacts to a distribution group (also called a distribution list).

Required: Before you get started, make sure you've already created a distribution group and added external contacts to your address book.

Sign in to the Exchange admin center. Use your Microsoft 365 email address and password (your GoDaddy username and password won't work here).
Go to recipients, and then select groups.
Select the name of the Distribution list and Edit.
In the new window, select membership and Add.
Choose the contact(s) and select add.
Select OK.
Your new contact(s) are now listed under Members. Select Save to close the window.