[Dovecot] deliver and cloning file permissions

Pascal Volk user+dovecot at localhost.localdomain.org
Sat Feb 13 22:28:04 EET 2010

On 02/13/2010 02:57 PM Alexander 'Leo' Bergolth wrote:
> Hi!
> I'd like to use deliver (dovecot-1.2.10) as LDA to deliver mails to my
> local users on my postfix-system.
> However, deliver tries to copy the filesystem permissions of the
> mail-spool-files to the user's index files, which doesn't work, since
> the files in /var/mail/ belong to the group 'mail'.
> Feb 13 00:21:19 leo-x61 dovecot: deliver(leo):
> fchown(/home/leo/mail/.imap/INBOX/dovecot.index.log.newlock, -1,
> 12(mail)) failed: Operation not permitted (egid=100(users), group based
> on /var/mail/leo)
> I know that dovecot tries to clone the mailbox permissions in order to
> support shared folders but it would be nice if there was an option to
> disable this (or to just try it and ignore the fchown error).
> I could manually change group ownership of all mailboxes from mail to
> each user's primary group or set the mailbox-modes to 0600 but I'd also
> have to do that for every new user.
> (Tools to create users like useradd from shadow-utils use hardcoded file
> modes and group ownership.)
> Is there any workaround?

Hm, what about a 'better solution'? Using Maildir.

Posttfix: main.cf¹
	mailbox_command = /usr/local/libexec/dovecot/deliver

Dovecot: dovecot.conf²
	mail_location = maildir:~/Maildir

1 = http://wiki.dovecot.org/LDA/Postfix
2 = http://wiki.dovecot.org/MailLocation
The trapper recommends today: defaced.1004413 at localdomain.org

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