Issue sharing folders with Thunderbird

[Jason Perry]

Hi Aki, they are.

> 3. The permissions for the file are:
> root at dal-notify-01 Maildir]# ls -la /var/lib/dovecot/db/shared-mailboxes.db
> -rw-rw-r--. 1 operations sharedusers 197 Aug 26 20:33 /var/lib/dovecot/db/shared-mailboxes.db
> 4. Users I'm testing with are part of the sharedusers group in /etc/group

The dir /var/lib/dovecot/db has this for permissions:
drwsrwsrwx.  2 root    sharedusers   33 Aug 27 21:12 db

the user operations is a member of “sharedusers” in /etc/group.  I even chmod’ed the permissions after to rw for global and I get the same error/result.

The file does appear to get written to.  For example, lets say user u2.name creates a folder called “starbucks” and uses the IMAP commands to share it out to user operations.  It seems to write to the acl_shared_dict file in /var/lib/dovecot/db/shared-mailboxes.db with an entry like
> shared/shared-boxes/user/u2.name/operations
> 1

And it writes to the ~/Maildir/.starbucks/dovecot-acl file for u2.user with an entry like:
user=operations lrw

So it appears to be working.  However, if I log into Thunderbird with the user operations account and go to subscribe, I do not see “starbucks” in the list of available folders.  And I still get the nfs_flush_chown error.

Is there anything else I can be doing with the file/dir permissions?

Thanks.


> On Aug 27, 2018, at 10:50 AM, Aki Tuomi <aki.tuomi at dovecot.fi> wrote:
> 
> acl_shared_dict file & folder must be readwritable by user performing the sharing as stated in wiki.
> 
> https://wiki.dovecot.org/SharedMailboxes/Shared
> ---
> Aki Tuomi
> Dovecot oy
> 
> -------- Original message --------
> From: Jason Perry <jason.perry at dtainc.us>
> Date: 27/08/2018 17:01 (GMT+02:00)
> To: dovecot at dovecot.org
> Subject: Issue sharing folders with Thunderbird
> 
> Trying to share folder "JasonAlerts" within mailbox operations to user u1.name
>  
> Issues:
> 1. Shared mailboxes do not appear under subscriptions in Thunderbird for another user
> 2. When I try to set permissions via IMAP commands I get in /var/log/dovecot.log
> Aug 26 20:33:24 imap(operations): Error: nfs_flush_chown_uid: chown(/var/lib/dovecot/db) failed: Permission denied
> 3. The permissions for the file are:
> root at dal-notify-01 Maildir]# ls -la /var/lib/dovecot/db/shared-mailboxes.db
> -rw-rw-r--. 1 operations sharedusers 197 Aug 26 20:33 /var/lib/dovecot/db/shared-mailboxes.db
> 4. Users I'm testing with are part of the sharedusers group in /etc/group
> 5. IMAP commands DO write to the file:
> [root at dal-notify-01 Maildir]# cat /var/lib/dovecot/db/shared-mailboxes.db
> shared/shared-boxes/user/u1.name/u2.name
> 1
> shared/shared-boxes/user/operations/u2.name
> 1
> shared/shared-boxes/user/u1.name/operations
> 1
> shared/shared-boxes/user/u1.name/operations
> 1
> 6. It will also write to the user's /home/operations/Maildir/.JasonAlert/dovecot-acl file
> user=u1.name ilrw
>  
> However if I got into Thunderbird and try to subscribe, none of the shared folders are listed.  Can anyone help??  Thanks!!
>  
> Dovecot version = 2.2.10
>  
> dovecot -n
> [root at server]# dovecot -n
> # 2.2.10: /etc/dovecot/dovecot.conf
> # OS: Linux 3.10.0-693.17.1.el7.x86_64 x86_64 CentOS Linux release 7.4.1708 (Core)
> first_valid_uid = 100
> listen = *
> log_path = /var/log/dovecot.log
> mail_debug = yes
> mail_location = maildir:~/Maildir
> mail_plugins = acl
> mail_privileged_group = mail
> mbox_write_locks = fcntl
> namespace Private {
>   hidden = no
>   inbox = no
>   list = no
>   location =
>   prefix = Private/
>   separator = /
>   type = private
> }
> namespace Public {
>   hidden = no
>   inbox = no
>   list = no
>   location = maildir:/var/mail/public
>   prefix = Public/
>   separator = /
>   subscriptions = yes
>   type = public
> }
> namespace Shared {
>   hidden = no
>   inbox = no
>   list = yes
>   location = maildir:/var/mail/%u:INDEXPVT=~/Maildir/%u
>   prefix = shared/%u/
>   separator = /
>   subscriptions = yes
>   type = shared
> }
> namespace inbox {
>   inbox = yes
>   location =
>   mailbox Drafts {
>     special_use = \Drafts
>   }
>   mailbox Junk {
>     special_use = \Junk
>   }
>   mailbox Sent {
>     special_use = \Sent
>   }
>   mailbox "Sent Messages" {
>     special_use = \Sent
>   }
>   mailbox Trash {
>     special_use = \Trash
>   }
>   prefix =
>   separator = /
> }
> passdb {
>   driver = pam
> }
> passdb {
>   driver = pam
> }
> plugin {
>   acl = vfile
>   acl_shared_dict = file:/var/lib/dovecot/db/shared-mailboxes.db <file:///var/lib/dovecot/db/shared-mailboxes.db>
> }
> protocols = imap
> ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
> ssl_key = </etc/pki/dovecot/private/dovecot.pem
> syslog_facility = local2
> userdb {
>   driver = passwd
> }
> userdb {
>   driver = passwd
> }
> protocol imap {
>   mail_plugins = acl imap_acl
> }
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