Put the below in your /etc/postfix/virtual file:

@[Domain].com [Local E-mail Account]

Put the below in your /etc/postfix/main.cf file:

virtual_alias_maps = hash:/etc/postfix/virtual

Issue the commands below:

postmap /etc/postfix/virtual
service postfix reload

I have a few addresses that I never want to receive e-mail for, like Facebook, Twitch, Twitter, and that type of thing. I had my virtual setup as "bounce" which is an /etc/alias for my main e-mail. Whoops! Here is my configuration below, /etc/postfix/main.cf and then /etc/postfix/virtual:

virtual_alias_maps = hash:/etc/postfix/virtual
abuse@hxrsmurf.info moo
kevin-fb@hxrsmurf.info moo
kevin-twitch@hxrsmurf.info moo
moo@hxrsmurf.info moo
@hxrsmurf.info kevin
@kvchmurphy.com kevin