Addition/Shared folders with dovecot 1.2

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Contents

Mission

Enable shared folders under iRedMail with dovecot 1.2.

Requirements

  • A properly working iRedMail system;
  • A properly working dovecot 1.2 instead of the default 1.1;

Notes

  • This article was written with a CentOS-based system in mind. Adapt it for your system.
  • You must have a good knowledge of the internal workings of iRedMail, mail services and so on.

Step-by-step configuration

  • Step 1.

Add proper namespaces to dovecot.conf:

File: 
# Namespaces
namespace private {
	subscriptions = yes
	separator = /
	prefix = 
	inbox = yes
}

namespace shared {
	subscriptions = no
	separator = /
	prefix = Shared/%%u/
	location = maildir:%%Lh/Maildir:INDEX=%Lh/Maildir/Shared/%%Lu
	list = children
	hidden = no
	inbox = no
}

The private namespace is the default namespace, if it's already in the config do not add it a second time. shared is the one we need here.

  • Step 2.

Add proper ACL dictionary to dict section of dovecot.conf:

File: 
dict {
    [...]
    acl = mysql:/etc/dovecot-acl-shared-dict.conf
}
  • Step 3.

Add ACLs to protocol imap in dovecot.conf:

File: 
protocol imap {
    [...]
    mail_plugins = quota imap_quota expire [...] acl imap_acl
    [...]
}
  • Step 4.

Add plugin section for ACLs in dovecot.conf:

File: 
plugin {
  acl = vfile
  acl_shared_dict = proxy::acl
}
  • Step 5.

Create the file /etc/dovecot-acl-shared-dict.conf:

File: 
connect = host=localhost dbname=vmail user=vmailadmin password=PASSWORD_HERE

map {
  pattern = shared/shared-boxes/user/$to/$from
  table = user_shares
  value_field = dummy

  fields {
    from_user = $from
    to_user = $to
  }
}
  • Step 6.

Create table user_shares in vmail database:

Terminal: 
CREATE TABLE `user_shares` (
  `from_user` varchar(100) NOT NULL,
  `to_user` varchar(100) NOT NULL,
  `dummy` char(1) default NULL,
  PRIMARY KEY  (`from_user`,`to_user`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
  • Step 7 - Optional
Terminal: 
If you haven't done it already when upgrading to dovecot 1.2, then add a new column, `enableinternal` to `mailbox` table, type bool, default true:
`enableinternal` tinyint(1) NOT NULL default '1'
Retrieved from "http://www.iredmail.org/wiki/index.php?title=Addition/Shared_folders_with_dovecot_1.2"
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