Set As Default Domain
By default, the default domain is @yourcompany.surel.io, after adding a new domain and the domain already verified you can set your domain as a default.
Click "Domain" on the Dashboard or under Manage Menu, and click "Gear" icon the domain you want to set as default.

When you select "SET AS DEFAULT DOMAIN," there is a pop-up notification that it will delete the trial domain and rename all the trial accounts to your domain.


After clicking "OK", there is a pop-up notification "Default Domain Updated" , and you will see only one domain under the Domains Menu

You can add another domain into surel.io as many as you want; follow this article to "Adding Domain Into Surel.io."