[Dovecot] default Dovecot-LDA CHGRP/CHMOD

[Chris Young]

I am familiar with this article
http://wiki.dovecot.org/LDA#multipleuids

I want to disable setuid-root, but I don't know the default group and
permissions.

sudo chgrp root /usr/libexec/dovecot/dovecot-lda
sudo chmod 00750 /usr/libexec/dovecot/dovecot-lda

but my delivery is still failing

Nov  9 18:22:39 vl42 postfix/pipe[23039]: DEC54700B1: to=<user at domain.com>,
orig_to=<user at domain.com>, relay=dovecot, delay=0.05, delays=0.04/0/0/0.01,
dsn=4.3.0, status=deferred (temporary failure. Command output: pipe: fatal:
pipe_command: execvp /usr/libexec/dovecot/dovecot-lda: Permission denied )

Thoughts?

Thanks
Chris