How to enable maildir format?

Hi,

I fear this is a FAQ, but I can't find a solution anywhere. I'm using sendmail 
8.9.3, procmail 3.15.1 and courier-imapd on a Suse 7.0 linux system. I want 
procmail to put mail into my maildir-format mailbox which is in 
$HOME/Maildir for every user. Instead, it refuses to use maildir and writes 
in the usual mbox-format.

How can I get procmail to write in maildir-format? I've attached some more 
info below.

Thanks!

        Rob


The .procmailrc for my user (rob) is:
MAILDIR=$HOME/Maildir
DEFAULT=$MAILDIR/mbox
LOGFILE=$MAILDIR/from
VERBOSE=yes

procmail -v as user rob reads:

[green] ~> procmail -v
procmail v3.15.1 2001/01/08
    Copyright (c) 1990-1999, Stephen R. van den Berg    <srb(_at_)cuci(_dot_)nl>
    Copyright (c) 1999-2001, Philip A. Guenther         
<guenther(_at_)sendmail(_dot_)com>

Submit questions/answers to the procmail-related mailinglist by sending to:
        <procmail-users(_at_)procmail(_dot_)org>

And of course, subscription and information requests for this list to:
        <procmail-users-request(_at_)procmail(_dot_)org>

Locking strategies:     dotlocking, flock()
Default rcfile:         $HOME/.procmailrc
Your system mailbox:    /var/spool/mail/rob

The ~/Maildir/from logfile:

procmail: [3025] Tue Apr  3 15:28:14 2001
procmail: Locking "/home/rob/Maildir/mbox.lock"
procmail: Assigning "LASTFOLDER=/home/rob/Maildir/mbox"
procmail: Opening "/home/rob/Maildir/mbox"
procmail: Acquiring kernel-lock
procmail: Unlocking "/home/rob/Maildir/mbox.lock"
> From rob(_at_)infologic(_dot_)com(_dot_)sg  Tue Apr  3 15:28:14 2001
 Subject: blabla
  Folder: /home/rob/Maildir/mbox                                            736
procmail: Notified comsat: "rob(_at_)3669:/home/rob/Maildir/mbox"

_______________________________________________
procmail mailing list
procmail(_at_)lists(_dot_)RWTH-Aachen(_dot_)DE
http://MailMan.RWTH-Aachen.DE/mailman/listinfo/procmail