Hi,
I think I found a bug in Dovecot 2.1.17 and 2.2.13.
In our setup, sometimes ACLs stop working because "dovecot-acl-list" is
replaced by an empty file. We found that lazy_expunge is connected to this.
To reproduce, create ACLs for "user1" in a folder. Put a mail in that
folder and expunge it, so that the folder will be created in the
"expunged" namespace.
For instance,
# cat user1/mail/mailboxes/folder/dbox-Mails/dovecot-acl
user=user2 keilrwts
# cat user1/mail/dovecot-acl-list
1350914868 folder
# doveadm -f flow fetch -u "user1" 'guid' mailbox _EXPUNGED.\*
# ls -l user1/mail/dovecot-acl-list
-rw------- 1 vmail vmail 0 2014-06-12 11:40 user1/mail/dovecot-acl-list
You see that we have used doveadm to list the expunged namespace, which
has emptied the "dovecot-acl-list" file.
Cheers,
Christoph
# 2.2.13: /usr/local/dovecot/etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-57-server x86_64 Ubuntu 10.04.4 LTS
disable_plaintext_auth = no
mail_gid = vmail
mail_location = mdbox:~/mail
mail_plugins = acl
mail_uid = vmail
namespace {
inbox = no
list = children
location = mdbox:%%h/mail
prefix = INBOX.shared.%%u.
separator = .
subscriptions = no
type = shared
}
namespace default {
inbox = yes
location =
prefix = INBOX.
separator = .
type = private
}
namespace expunged {
hidden = yes
list = no
location =
mdbox:~/mail:MAILBOXDIR=expunged:SUBSCRIPTIONS=expunged-subscriptions
prefix = _EXPUNGED.
separator = .
subscriptions = yes
}
passdb {
args = scheme=CRYPT username_format=%u
/usr/local/dovecot/etc/dovecot/users
driver = passwd-file
}
plugin {
acl = vfile
acl_shared_dict = file:/mail/shared-mailboxes
lazy_expunge = _EXPUNGED.
}
protocols = imap pop3
service auth {
unix_listener auth-userdb {
group = vmail
mode = 0660
}
}
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_key = </etc/ssl/private/dovecot.pem
userdb {
args = /usr/local/dovecot/etc/dovecot/users
driver = passwd-file
}
protocol imap {
imap_client_workarounds = tb-extra-mailbox-sep
mail_max_userip_connections = 20
mail_plugins = acl imap_acl acl
}
--
Christoph Bußenius
Rechnerbetriebsgruppe Informatik und Mathematik
Technische Universität München
