Change root adress?

[dennis00]

[email protected] sends all kind of spam e-mail to my personal e-mail adress: [email protected]

How can I change the adress qmail sends mail like this to?

Spam detection software, running on the system "server1.xxx.nl", has identified this incoming email as possible spam.  The original message has been attached to this so you can view it (if it isn't spam) or block similar future email.  If you have any questions, see the administrator of that system for details.

Content preview:  Hi. This is the qmail-send program at
  server2.xxx.nl. 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. [...] 

Content analysis details:   (66.8 points, 5.0 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
 0.3 NO_REAL_NAME           From: does not include a real name
 100 USER_IN_BLACKLIST      From: address is in the user's black-list
 -33 AWL                    AWL: Auto-whitelist adjustment