How can I integrate Zarafa with procmail?

In the postfix configuration file "master.cf", add the following rule:

zarafa unix - n n - - pipe 
 flags= user=vmail argv=/usr/bin/procmail -a ${user}

After that, edit the postfix configuration file "main.cf" and add the following line:

mailbox_transport = zarafa 

When that is completed, edit the procmail configuration file "/etc/procmailrc" and add the following lines:

 USER=$1
:0w* ^X-Spam-Status: Yes 
| zarafa-dagent -j $USER
EXITCODE=$?

:0w
| zarafa-dagent $USER
EXITCODE=$?

After this, restart postfix by issuing the command: 

/etc/init.d/postfix reload