Access to MailDir

So I have been messing around with my new account. And I am trying to figure out how the mail is stored.

Do I only have access to the Maildir for the email addresses that are matched to users? So any email address to a user mXXXXXXX is not stored on my machine and i cannot directly access the Maildir for that email address? So if I want direct access to the Maildir I need to make a user for each email account?




Great, thanks for the response. It took me a while but I figured out most of it on my own, I just wanted to make sure I wasnt missing something.