I have dovecot version 2.0.9

I am confused about this article http://wiki2.dovecot.org/Errors/ChgrpNoPerm

my mail_location = mbox:~/mymail:INBOX=/var/mail/%u

So my inbox is at var/mail/ and my imap folder is /home/user/mymail

The problem is /var/mail (Owner is useraccount and the group us mail) , and here comes the problem Dovecot keeps trying to chown the imap folder inside the homedirectory with user:mail account and since And this is the reason of error that appears in my log file.

The option mail_access_groups=mail solve the problem.. but I read it is not secure.. With my current configutation, users login with imap to read mail , can they use any the mail_access_groups=mail and read other poeple mail ? does my configutation is a shard mailbox and could be unsecure..

my main quesion , for my current configuration , can i use mail_access_groups=mail safely or can some user use this to read other people mail ? attached my configuration.

why didnot have this issue with uw-imapd? and why dovecot try to chown the .imap folder with the mail group ?

dovecot -n output is

# 2.0.9: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-279.2.1.el6.x86_64 x86_64 CentOS release 6.3 (Final) disable_plaintext_auth = no mail_debug = yes mail_location = mbox:~/mymail:INBOX=/var/mail/%u mbox_write_locks = fcntl passdb { driver = pam } ssl_cert = </etc/pki/dovecot/certs/dovecot.pem ssl_key = </etc/pki/dovecot/private/dovecot.pem userdb { driver = passwd } protocol pop3 { pop3_uidl_format = %08Xu%08Xv } [ Robert