A Debian developer had this to say:
> >> Files in the above dir are group mail, and the dir is group mail.
However,
> > > all binaries in /usr/lib/dovecot are root/root. I have set them
all to g+s,
> > > and group mail, and now the imap process can lock the INBOX.
> >
>
> > imap should be the only one that needs to be setgid mail.
>
> Actually, I've looked at the dovecot source code. There is no way
having
> setgid on the executable will work. The source drops the privledges long
> before it tries to do a dotlock.
>
> This is an upstream problem.
>
> For now, I've disable dotlock, and use fcntl instead, as that is what
exim
> uses anyways.
Is dotlocking still a work in progress or are we missing something here?
--
Jaldhar H. Vyas <jaldhar at debian.org>
La Salle Debain - http://www.braincells.com/debian/