Delete Alias Window
To delete any e-mail aliases, you would click on the button "Delete" and you should see a page similar to the above in your web browser. Select the ones that you want to remove from the alias list by clicking on the button beside the numbers and then clicking on "Delete Aliases". Then, on the next page, please click on "Back to form".
In this example, the first e-mail alias was removed just by selecting it and clicking on the "Delete Aliases" button.
Delete Alias Window with Deleted Alias
After you click on "Back to form", you will see the modified list of aliases which does not show the deleted aliases anymore.