You can change the destination of any alias that exists on your server. To rename an alias, however, you must create a new alias with the same destination as the original alias.
To edit an existing alias, follow the steps below:
Click the Email Aliases link from within the Mail Management menu.
A list of currently defined aliases appears.
Click the Edit link next to the name of the alias you wish to update.
The name of the alias appears, along with the current destination.
Type a new destination into the text box and click Update.
Click the Restart Sendmail link to activate the changes to your alias settings.
An updated list of your current aliases appears.