Dovecot, Shared Folder und Shared Namespace

… coming soon!

Als erstes Datenbankverzeichnis anlegen:

 # mkdir /var/lib/dovecot/db

Berechtigungen für unseren virtuellen Mailbox-User vmail setzen.

 # chown vmail.vmail /var/lib/dovecot/db/

 # vim /etc/dovecot/conf.d/10-master.conf

... 
 
service auth {
  # auth_socket_path points to this userdb socket by default. It's typically
  # used by dovecot-lda, doveadm, possibly imap process, etc. Users that have
  # full permissions to this socket are able to get a list of all usernames and
  # get the results of everyone's userdb lookups.
  #
  # The default 0666 mode allows anyone to connect to the socket, but the
  # userdb lookups will succeed only if the userdb returns an "uid" field that
  # matches the caller process's UID. Also if caller's uid or gid matches the
  # socket's uid or gid the lookup succeeds. Anything else causes a failure.
  #
  # To give the caller full permissions to lookup all users, set the mode to
  # something else than 0666 and Dovecot lets the kernel enforce the
  # permissions (e.g. 0777 allows everyone full permissions).
  unix_listener auth-userdb {
    # Django : 2014-08-08
    # Authentication Socket für userdb-Anfragen bei Nutzung von shared folders
    # default: #mode = 0666
    #          #user = 
    #          #group =
    user = vmail
    group = vmail
  }
 
  # Postfix smtp-auth
  #unix_listener /var/spool/postfix/private/auth {
  #  mode = 0666
  #}
 
  # Auth process is run as this user.
  #user = $default_internal_user
}
 
...

 # vim /etc/dovecot/conf.d/10-mail.conf

...
 
# Space separated list of plugins to load for all services. Plugins specific to
# IMAP, LDA, etc. are added to this list in their own .conf files.
# Django : 2014-08-05
# default: #mail_plugins =
#mail_plugins = zlib
# Django : 2014-08-06 - Quotaregelung aktiviert
# last   : mail_plugins = zlib
mail_plugins = zlib quota
# Django : 2014-08-08 - ACL-Plugin für Shared Folders
mail_plugins = zlib quota acl
 
...

 # vim /etc/dovecot/conf.d/20-imap.conf

...
 
protocol imap {
  # Space separated list of plugins to load (default is global mail_plugins).
  #mail_plugins = $mail_plugins
  # Django : 2014-08-06 Quota-Informationen via IMAP zur Verfügung stellen
  #mail_plugins = $mail_plugins imap_quota
  # Django : 2014-08-08 ACL-Verwaltung via IMAP zur Verfügung stellen
  mail_plugins = $mail_plugins imap_quota imap_acl
 
  # Maximum number of IMAP connections allowed for a user from each IP address.
  # NOTE: The username is compared case-sensitively.
  #mail_max_userip_connections = 10
}
 
...

 # vim /etc/dovecot/conf.d/90-acl.conf

/etc/dovecot/conf.d/90-acl.conf

##
## Mailbox access control lists.
##
 
# vfile backend reads ACLs from "dovecot-acl" file from mail directory.
# You can also optionally give a global ACL directory path where ACLs are
# applied to all users' mailboxes. The global ACL directory contains
# one file for each mailbox, eg. INBOX or sub.mailbox. cache_secs parameter
# specifies how many seconds to wait between stat()ing dovecot-acl file
# to see if it changed.
plugin {
  # Django : 2014-08-08
  # default: #acl = vfile:/etc/dovecot/global-acls:cache_secs=300
  acl = vfile
}
 
# To let users LIST mailboxes shared by other users, Dovecot needs a
# shared mailbox dictionary. For example:
plugin {
  # Django : 2014-08-08
  # default: #acl_shared_dict = file:/var/lib/dovecot/shared-mailboxes
  acl_shared_dict = file:/var/lib/dovecot/db/shared-mailboxes
}

 # vim /etc/dovecot/conf.d/10-mail.conf

...
 
# Django : 2014-08-08
# default: unset
# Example shared namespace configuration
#namespace {
  #type = shared
  #separator = /
 
  # Mailboxes are visible under "shared/user@domain/"
  # %%n, %%d and %%u are expanded to the destination user.
  #prefix = shared/%%u/
 
  # Mail location for other users' mailboxes. Note that %variables and ~/
  # expands to the logged in user's data. %%n, %%d, %%u and %%h expand to the
  # destination user's data.
  #location = maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u
 
  # Use the default namespace for saving subscriptions.
  #subscriptions = no
 
  # List the shared/ namespace only if there are visible shared mailboxes.
  #list = children
#}
# Should shared INBOX be visible as "shared/user" or "shared/user/INBOX"?
#mail_shared_explicit_inbox = no
 
namespace {
  type = shared
  separator = /
  prefix = shared/%%u/
  location = maildir:%%h/Maildir:INDEX=%h/shared/%%u:CONTROL=%h/shared/%%u
  inbox = no
  hidden = no
  list = children
  subscriptions = yes
}
 
...

 # systemctl reload dovecot