Learning procmail

[Paul Michael Reilly]

I have begun the process of learning how to use procmail to filter
incoming mail messages.  I see that Fedora embeds procmail into the
sendmail configuration files.  What I would like to do is either find
some kind of tutorial or some mechanism that I can use to bootstrap my
knowledge by doing something and seeing some result, most likely in a
log file (and eventually in a mail buffer).  Any suggestions?

Thanks

-pmr