Am 20.08.2014 um 23:57 schrieb Gionatan Danti:

Hi all, I have a problem with my Dovecot installation. First, some informations:

• OS: CentOS 6.5 x86_64
• Dovecot: dovecot-2.0.9-7.el6.x86_64

Config: mail_location = sdbox:~/dbox user_query = SELECT username, password, 'vmail' as uid, 'vmail' as gid, '/var/vmail/%d/%n' as home, CONCAT('*:storage=', (quota DIV 1000)) as quota_rule FROM mailbox WHERE username='%u'

What I want to do is to create a backup user to rsync the mailstore to a remote location. If possible, I don't want to use the root user for this operation. I already added the backup user to "vmail" group.

The problem is that when a new user is created, it's base directory permission are 0700 (vmail:vmail). From what I read here (http://wiki2.dovecot.org/SharedMailboxes/Permissions, "Permissions to new /domain/user directories"), simply using the setgid bit is not sufficient because I am not using an absolute path for mail_location.

My questions are:

1. all I need to do is to switch to an absolute mail_location?
2. it is possibile to solve my problem _without_ altering mail_location?

Thanks.

You could use sudo to grant your backup user the required rights to read those files.

==> /etc/sudoers backupuser ALL=NOPASSWD: /usr/bin/rsync

-- Alex JOST