[Quick Reference]
To enable Maildir support with the Postfix MTA:
/etc/postfix/main.cf home_mailbox = Maildir/ mailbox_command = procmail -a "$EXTENSION"
then:
/etc/procmailrc DEFAULT=$HOME/Maildir/
Obviously you must have a good POP3/IMAP4 Server (dovecot, Courier, it’s your choice 
.
Enjoy