[Dovecot] problems with postfix->procmail->deliver

[Andy Greenwood]

Hi all.

I'm relatively new to Dovecot, but I really like what I'm seeing so far. 
I have one problem that I was hoping you could help me with though. I 
use Postfix for my mail server, then pass that on to procmail for 
filtering, and finally to deliver to put the mail in the appropriate 
Maildir folder. However, this isn't working. Postfix passes the mail to 
procmail correctly, but procmail is failing when it tries to call 
deliver. My system-wide procmailrc matches the lower one shown here: 
http://wiki.dovecot.org/procmail?highlight=%28procmail%29 which uses 
deliver.

My personal ~/.procmailrc is of similar format

:0
* ^List-id:.<beginners.perl.org>
#.perl/
| $DELIVER -m perl

:0
* ^Sender:.owner.freebsd-\/[^@]+ at FreeBSD.ORG
{
 LISTNAME=${MATCH}
 :0
 * LISTNAME??^\/[^@]+
# .freebsd-${MATCH}/
| $DELIVER -m freebsd-${MATCH}
}

:0
* ^Sender:.owner-cvs-all at freebsd.org
#.cvs-all/
| $DELIVER -m cvs-all

:0
* ^Delivered-To: greenwood.andy+combackup at gmail.com
#.work/
| $DELIVER -m work

:0
#$HOME/Maildir/
| $DELIVER


However, my procmail logs show this error message for every message that 
comes through:
Fatal: destination user parameter (-d user) not given

I can see that the variable $DELIVER doesn't use the -d parameter, but 
I'm not sure on how I would specify the value in a multi-user system. I 
know I could just use deliver directly from Postfix, but I really want 
to use the filtering capabilities of procmail. If you need any 
additional information, just let me know. Thanks in advance for any help 
you can give, and big thanks for this great piece of software!

Andy Greenwood