How do I delete an alias from my Apple ID

iCloud: Create an email alias in iCloud Mail

Change, turn off, turn on, or delete an alias

1. Click the Action pop-up menu in the sidebar, then choose Preferences.
2. Click Accounts.
3. Select the alias in the Addresses list, then do any of the following:

   Turn off an alias: Select “Disable alias.”

   Delete an alias: Click Delete.

4. Click Done.