I've one account for my mail server [email protected]

I just forward everything to this account with a virtual setup

postfix-virtual.cf

@foo.bar [email protected]

So I can register all my accounts like this

[email protected]
[email protected]
[email protected]

But how can I block specific accounts?

Lets say my [email protected] mail got leaked and I keep getting spam on it. So I want to reject all mails sent to this address. Or just delete them on receive. Doesn't really matter to me.

Is there a way I can set this up?