bouncing bad mail

I don't have a user by the name of junkmail@miltonstreet.com, but it
does seem that spammer think that I do because I get a number of
emails in the postmasters account every day that look like this:

---------------------------EMAIL---------------------------
Hi. This is the qmail-send program at miltonstreet.com.
I tried to deliver a bounce message to this address, but the bounce
bounced!

<micher51@popstar.com>:
205.158.62.72 does not like recipient.
Remote host said: 550 <micher51@popstar.com>: No thank you: rejected:
Account Unavailable: Possible
+Forgery
Giving up on 205.158.62.72.

--- Below this line is the original bounce.

Return-Path: <>
Received: (qmail 1260 invoked for bounce); 25 Nov 2003 23:17:27 -0000
Date: 25 Nov 2003 23:17:27 -0000
From: MAILER-DAEMON@miltonstreet.com
To: micher51@popstar.com
Subject: failure notice

Hi. This is the qmail-send program at miltonstreet.com.
I'm afraid I wasn't able to deliver your message to the following
addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<junkmail@miltonstreet.com>:
Sorry, no mailbox here by that name. (#5.1.1)

--- Below this line is a copy of the message.

Return-Path: <micher51@popstar.com>
Received: (qmail 1257 invoked from network); 25 Nov 2003 23:17:27
-0000
Received: from (HELO incoming.miltonstreet.com) ()
by miltonstreet.com with SMTP; 25 Nov 2003 23:17:27 -0000
Received: (qmail 1871 invoked from network); 25 Nov 2003 23:17:19
-0000
Received: from cliente-217216216207.ubrgra01.supercable.es
(217.216.216.207)
by incoming.miltonstreet.com with SMTP; 25 Nov 2003 23:17:19 -0000
Received: from [46.234.225.39] by
cliente-217216216207.uBRgra01.supercable.es; Tue, 25 Nov 2003
+07:12:54 -0400
Message-ID: <kdh1d3iz40bq@7hfq2y1>
From: "Keri Dodge" <micher51@popstar.com>
Reply-To: "Keri Dodge" <micher51@popstar.com>
To: junkmail@miltonstreet.com
---------------------------EMAIL---------------------------

What can I do to simply discard any emails that come into
junkmail@miltonstreet.com?

> What can I do to simply discard any emails that come into
> junkmail@miltonstreet.com?

Create an alias for this user with a .qmail-junkmail which only holds a #.
qmail won't deliver the mail at all.

Arno