Why does mail.kde.org relays SPAM messages.

Spel <spelya-FFYn/[email protected]> Mon, 19 Feb 2007 09:48:40 -0500
Newsgroups gmane.comp.kde.devel.kbabel,gmane.comp.kde.general
Message-ID <[email protected]>
From the moment I subscribe to one of your list, namely [email protected],
I started receiving SAPM on a regular basis. Just have a quick look at
the KBabel Archives http://mail.kde.org/pipermail/kbabel/ and you will
see lots of viagra and pharmacy related subjects messages.

Why does the KDE organization accept those messages to get through and
passed on to subscribers?