mailbox prefix

[michael crane]

dovecot version 2.2.13

hello,
I try to make a new server just for me after having old one working for
ages with Dovecot, Fetchmail, Squirrelmail, Procmail
making new one with above plus Postfix using Maildir structure.
I am having a bit of trouble understanding exactly what the namespace and
prefix are.
Is the "private/" prefix an internal thing with Dovecot ? Or is it supposed
to be a real directory ?
I'm not quite sure how to properly address the INBOX in Procmail,
Squirrelmail, Postfix config.


for example am I supposed to say inbox is ".private/.INBOX"



cheers

zemlik