Symptom:
(public)		 Undeliverable emails which were sent by your RaQ bounce back to you because the destined recipient does no longer exist on the recipient's server. This is normal behaviour of your RaQ.

While these bounces can help you to troubleshoot potential problems (like finding scripts being used to send spam) most people find them annoying.

Problem:
(public)
Solution:
(public)

Many people therefore edit /etc/mail/aliases or /etc/aliases (RaQ2, RaQ3) and change the following line ...

postmaster:     root

.. to ...

postmaster:         /dev/null

That will then forward all emails for postmaster to /dev/null, which is the Linux trashbin.

In order for these changes to take effect you need to run this two commands after your edit of the file:

RaQ4, RaQ550, XTR, Qube3:

makemap hash /etc/mail/aliases.db </etc/mail/aliases
/etc/rc.d/init.d/sendmail restart

RaQ2, RaQ3:

makemap hash /etc/aliases.db </etc/aliases
/etc/rc.d/init.d/sendmail restart

But as said: For troubleshooting purpose it is wise to not do this, because otherwise you risk that you learn too late when someone is abusing that formail.pl script which one of your customers uploaded to his website.