Thanks Aseques. The HowTo on the wiki was not clear, I thought this is something that had to be done for the distros listed: Debian Etch usw, Debian Lenny, and *BSD dovecot from port.
Looking at my directory structure (Centos5.4), I see dovecot/deliver is in: /usr/libexec/dovecot/deliver
So this should be the correct piping for RHEL and CentOS??:
Quote:dovecot unix - n n - - pipe
flags=DRhu user=vmail:mail argv=/usr/libexec/dovecot/deliver -f ${sender} -d ${recipient} -s
I get the following error in /var/log/maillog:
Quote:(command line usage error. Command output: Fatal: Unknown argument: -s Usage: deliver [-c <config file>] [-d <destination user>] [-m <mailbox>] [-n] [-e] [-f <envelope sender>] )