hello again..

What is the file crontab good for ?

I was looking for a file to manage my mail-fetching from our pop-server 
every 10 min (or so..) ..
A friend using linux told me that at him it was crontab which did things 
like that, but I was a little confused when I looked into our crontab..

So what file can be used to do that ?

Jan-Uwe