Seeking clarification about mail program interaction

[cmasters <cmasters@despamnbnet.nb.ca>]

Greetings,

Now that I have my printer running properly, I'm trying to tackle the
problem of mail delivery. I've installed fetchmail, procmail, and exim, but
I have yet to make them interact properly. For the moment I am using
~getmail~ (a fetchmail replacement) to poll my ISP and deliver my mail in a
timely manner. I then read it from mutt and can send (obviously).

I'd like to be able to use the benefits of procmail though, so I thought I'd
get some clarification on the actual process involved. This is what I
understand would happen:

1. fetchmail (currently getmail) retrieves mail from ISP and hold it locally
2. procmail ~should~ then sort it according to recipes that I write
3. mutt reads the mail from any and ~all~ folders / mbox's that have been
effected by the sorting

My difficulty is that the few times I have tested fetchmail, it retrieves
and then deletes ~all~ mail not expressly addressed to
"cmasters@nbnet.nb.ca". This means that mail from lists (including this one)
is dropped before I am able to read it. It doesn't remain on my ISP's
server, it just get dropped. I had thought that directing fetchmail to refer
to procmail (ala the mda command) that sorting (~any~ pre-read deletion)
would be done through procmail.

Id appreciate it if someone would correct my reasoning and/or explain this
better. If it would help, I will include the relevent rc files.

Thank you,
C. Masters