Periodic configuration

[Edd]

Hi,
I am trying to cut down on the amount of mail I recieve in my root
mailbox. I kno this could be done by turning off the periodic tasks. I
am happy to tuen off the status daily, but would still like to recieve
the security mail ONLY when something is out of the norm. I have looked
at making a periodic.conf, but dont really know how to go about this.
Can anyone help?