You can add another alias to your account at any time from the Home page.
To do this, click on thebutton in the delivery group that you want to update.
On the following page, click on the button. A text box will appear, and you can type in the new alias. Next to the text box, there will be a drop-down menu:
Using that drop-down menu, you can choose an alias at one of our domains, or one of your domains if you have set that up on your account.
Finish making your changes by clicking on the "Add" button!
To remove an alias, just click thebutton next to the alias you want to remove.