OPTION 1 (Deliver Locally): When you first activate your account with us, we tell our mail server to deliver all of your messages to your "postmaster" account. This ensures you do not lose any emails before you have a chance to configure these options.
You can continue to use the postmaster as the catch-all account, but you'll need to setup your email program to download these messages to ensure they do not fill up the account and start bouncing new email. Refer to this page for setup information of various email programs.
OPTION 2 (Deliver Externally): You have the option to deliver your catch-all mail to an external address such as Hotmail.com or Gmail.
OPTION 3 (Bounce Email): Using this option is an effective method of minimizing the volume of spam you will receive. By choosing this option, you will not receive emails sent to xyz@domain.com and instead these messages will bounce back to the sender.
OPTION 4 (Discard Mail): This option is essentially the same as Option 3, except these messages will be deleted at the server level as they arrive and the sender will not receive a bounced email.
OPTION 5 (Alternative): This setting will override all individual mailboxes and aliases that currently exist for your domain and instead will send everything to one specific location, such as xyz@hotmail.com.
Once you've made your selection, go ahead and click "Enable Change". Your setting will take affect immediately.
SCREENTSHOT: