INBOX sharing does not work

[Sami Ketola]

Hi,

try setting mail_shared_explicit_inbox=yes

https://doc.dovecot.org/settings/core/#mail-shared-explicit-inbox <https://doc.dovecot.org/settings/core/#mail-shared-explicit-inbox>

Sami

> On 18. Aug 2020, at 23.56, Torsten <dovecot.lists at saldyn.net> wrote:
> 
> Hello!
> 
> INBOX sharing does not seem to work, although all other mailboxes work.
> 
> User bar at example.de has shared a few mailboxes:
>  # doveadm acl get -u bar at example.de INBOX
>  ID                  Global Rights 
>  user=foo at example.de        lookup read write-seen 
>  # doveadm acl get -u bar at example.de Sent
>  ID                  Global Rights 
>  user=foo at example.de        lookup read write-seen 
>  # doveadm acl get -u bar at example.de Drafts
>  ID                  Global Rights 
>  user=foo at example.de        lookup read write-seen
> 
> But user foo at example.de can't see the shared INBOX:
>  # doveadm mailbox list -u foo at example.de
>  Trash
>  Sent
>  Drafts
>  Junk
>  shared
>  shared/bar at example.de
>  shared/bar at example.de/Sent
>  shared/bar at example.de/Drafts
>  INBOX
> 
> A review of the ACL does not explain the behaviour:
>  # doveadm acl debug -u foo at example.de shared/bar at example.de/INBOX
>  doveadm(foo at example.de): Info: Mailbox 'INBOX' is in namespace 'shared/bar at example.de/'
>  doveadm(foo at example.de): Info: Mailbox path: /srv/mail-storage/mailhome/example.de/bar/Maildir
>  doveadm(foo at example.de): Info: Per-user private flags in mailbox: \Seen
>  doveadm(foo at example.de): Info: User foo at example.de has rights: lookup read write-seen
>  doveadm(foo at example.de): Info: Mailbox found from dovecot-acl-list
>  doveadm(foo at example.de): Info: User bar at example.de found from ACL shared dict
>  doveadm(foo at example.de): Info: Mailbox shared/bar at example.de/INBOX is visible in LIST
> 
> 
> ----------  doveconf -n  ----------
> # 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.5.4 ()
> # OS: Linux 4.19.0-10-amd64 x86_64 Debian 10.5
> # Hostname: XXX.YYYY.de
> auth_master_user_separator = *
> auth_verbose = yes
> first_valid_gid = 401
> first_valid_uid = 401
> last_valid_gid = 401
> last_valid_uid = 401
> mail_gid = vmail
> mail_home = /srv/mail-storage/mailhome/%d/%n
> mail_location = maildir:~/Maildir
> mail_plugins = " acl listescape zlib"
> mail_uid = vmail
> managesieve_notify_capability = mailto
> managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext
> namespace inbox {
>  inbox = yes
>  location =
>  mailbox Drafts {
>    auto = subscribe
>    special_use = \Drafts
>  }
>  mailbox Junk {
>    auto = create
>    special_use = \Junk
>  }
>  mailbox Sent {
>    auto = subscribe
>    special_use = \Sent
>  }
>  mailbox "Sent Messages" {
>    auto = no
>    special_use = \Sent
>  }
>  mailbox Trash {
>    auto = subscribe
>    special_use = \Trash
>  }
>  prefix =
>  separator = /
>  type = private
> }
> namespace shared {
>  list = children
>  location = maildir:/srv/mail-storage/mailhome/%%d/%%n/Maildir:INDEXPVT=~/Maildir/shared/%%d/%%n
>  prefix = shared/%%u/
>  separator = /
>  subscriptions = yes
>  type = shared
> }
> passdb {
>  args = /etc/dovecot/master-users
>  driver = passwd-file
>  master = yes
>  pass = yes
> }
> passdb {
>  args = /etc/dovecot/dovecot-ldap.conf.ext
>  driver = ldap
> }
> plugin {
>  acl = vfile
>  acl_shared_dict = file:/srv/mail-storage/mailhome/shared-mailboxes.db
>  sieve = file:~/sieve;active=~/.dovecot.sieve
>  zlib_save = gz
>  zlib_save_level = 6
> }
> protocols = " imap lmtp sieve"
> service auth {
>  unix_listener auth-userdb {
>    mode = 0777
>  }
> }
> ssl = required
> ssl_cert = </var/lib/dehydrated/certs/XXX.YYYY.de/fullchain.pem
> ssl_dh = # hidden, use -P to show it
> ssl_key = # hidden, use -P to show it
> userdb {
>  driver = static
> }
> userdb {
>  args = /etc/dovecot/dovecot-ldap.conf.ext
>  driver = ldap
> }
> protocol lmtp {
>  mail_plugins = " acl listescape zlib sieve"
> }
> protocol imap {
>  mail_max_userip_connections = 20
>  mail_plugins = " acl listescape zlib imap_acl"
> }
> ------------------------------
> 
> I don't think it is relevant, but I don't want to forget to mention that /srv/mail-storage/ is an NFS share.
> 
> It would bee nice if someone has a hint. I hope it isn't a bug.
> 
> Regards Torsten

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