How make Postifx Silent to any Spam, sending NO Response

Right now,
I am able to reject any email sent to non-existed in the SMTP step.
However, in this case Postfix will return a code of 550.
Because of this response, the sender will know that the mail is not delivered.

This is what I want,
I want Postfix don't response to the sender at all.
Or Postfix just tell everyone that it receives the mail.
Is it possible to make Postfix total silent in this case?
For example, I just don't want Postfix to response to the senders at all.
Or Postfix just fool the sender that it receive the email.

Solution: How make Postifx Silent to any Spam, sending NO Response

IMVHO it's good to tell the sender the message got rejected. Just in case it is not really spam, but awaited offering.

But anyway, postfix accepts the DISCARD m/filter action - refer http://www.postfix.org/access.5.html

How make Postifx Silent to any Spam, sending NO Response

Solution: How make Postifx Silent to any Spam, sending NO Response

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