Dovecot Public folder Issue with dot locking

i finally manage to control access on public folder by File system permission.
i have 3 test users.

1. tom
2. fmaster
3 . testmail

tom and fmaster are a group called "news-own" and testmail user is a
readonly one.

here is my folder structure ill share dovecot -n output at the end of
this email.

drwxrwxr-t 2 tom news-own 4.0K Dec 4 19:08 tmp
drwxrwxr-t 2 tom news-own 4.0K Dec 4 19:08 new
-rwxrwxrwx 1 tom news-own 68 Dec 4 19:08 dovecot-uidlist
-rw-rw-r-T 1 fmaster news-own 16K Dec 4 19:10 dovecot.index.cache
drwxrwxr-t 2 tom news-own 4.0K Dec 4 19:15 cur
-rw-rw-r-T 1 tom news-own 1.1K Dec 4 19:16 dovecot.index.log

everything works fine as far as user fmaster and tom is concern as
they are member of "news-own" and this group own the mailbox now the
problem i face with readonly users.

i am getting this error in /var/log/mail.info (against user testmail)

file_dotlock_create(/public/.News/dovecot-uidlist) failed: Permission
denied (euid=1002(testmail) egid=1002(testmail) missing +w perm:
/public/.News


at first point i saw this error and i could not subscribe to the
folder. and the said log has been generated.

now on second stage i change the dovecot-uidlist file permission to
"1666" so that testmail user can also write to the file.

now problem starts from here, i see two folder one is News and second
one is News-1 and i don't know from where the second folder showed up.

and when i click on any of the folder my /var/log/mail.info start to
show below massage continuously. until i restart the dovecot service.

file_dotlock_create(/public/.News/dovecot-uidlist) failed: Permission
denied (euid=1002(testmail) egid=1002(testmail) missing +w perm:
/public/.News


i search google and i saw that people suggested to set stickey bit on
which i already did or suggested to stop "dot locking"

so i am here to ask is there any way to solve my said problem with out
disabling dot locking?

or if i stop dot locking what are the consequences?


here i my dovcecot -n


root@mailsrv:/public/.News# dovecot -n
# 1.2.15: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.6
log_timestamp: %Y-%m-%d %H:%M:%S
ssl_cert_file: /etc/ssl/certs/postfix.pem
ssl_key_file: /etc/ssl/private/postfix.key
login_dir: /var/run/dovecot/login
login_executable: /usr/lib/dovecot/imap-login
mail_privileged_group: mail
mail_location: maildir:~/Maildir:INBOX=~/Maildir/:INDEX=~/Maildir/index
mail_debug: yes
mbox_write_locks: fcntl dotlock
namespace:
type: private
separator: /
inbox: yes
list: yes
subscriptions: yes
namespace:
type: public
separator: /
prefix: Shared folders/
location: maildir:/public
list: yes
auth default:
mechanisms: plain login
passdb:
driver: pam
userdb:
driver: passwd
socket:
type: listen
client:
path: /var/spool/postfix/private/auth
mode: 432
user: postfix
group: postfix


Thanks in advance, any help or suggestion would be highly appreciated.

Why wouldnt you just use a forwarder

chatwizrd said:

Why wouldnt you just use a forwarder

Click to expand...

I am using IMAP and i have 40 mail accounts if an announcement (for example) of 10 MB should be forwarded to all the members which means this (huge) should be stored in each mail box. means 40x10 = 400MB. therefore i think to minimize the storage issue the best option would be public folder.

Then use a mailing list software.

chatwizrd said:

Then use a mailing list software.

Click to expand...

Thanks for the advice. but i already work and studied dovecot alot. i am looking for a single open mail server solution like. exchange server or mailerdaemon etc. so putting all togather postfix and dovecot etc. i could manage this. i think studying mailing list software would be out of scope.

Thanks.

Are you aware that this forum is for users of the DirectAdmin control panel? Based on your posts, it appears you may not be using DirectAdmin.

Jeff