Strange cron message.

[Erik P. Olsen]

Hi there,

I have received this cron message:

From: Cron Daemon 
To: [e-mail]
Subject: Cron  /usr/lib/mailman/cron/mailpasswds
Date: Mon, 1 Aug 2005 05:00:01 +0200
Site list is missing: mailman

Does somebody know what this is all about and what I am supposed to do
about it?