Trouble getting listescape plugin to work with "$" separator (as demonstrated in Wiki) in Dovecot 2.2.9

[Ben Johnson]

Hello,

I'm attempting to install the listescape plugin so that IMAP users are
able to include periods (.) and forward slashes (/) in IMAP directory names.

I'm following the instructions at
http://wiki2.dovecot.org/Plugins/Listescape , which imply that this can
be accomplished by enabling the listescape plugin and using the dollar
sign ($) as the separator.

With regard to my dovecot configuration, first, I changed

protocol imap {
  mail_plugins = quota imap_quota antispam
}

to

protocol imap {
  mail_plugins = quota imap_quota antispam listescape

  namespace private {
    separator = $
    inbox = yes
  }
}

When I start dovecot, I receive the following error:


doveconf: Warning: NOTE: You can get a new clean config file with:
doveconf -n > dovecot-new.conf
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:102:
namespace private {} has been replaced by namespace { type=private }


Pretty straightforward; I made the required change to yield

protocol imap {
  mail_plugins = quota imap_quota antispam listescape

  namespace {
    type = private
    separator = $
    inbox = yes
  }
}

But now, when I attempt to start dovecot, I receive the following error:


doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf
line 104: Unknown variable: $
doveconf: Error: managesieve-login: dump-capability process returned 89
doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf
line 104: Unknown variable: $


Is it possible that the instructions at the Wiki 2 URL cited above are
out-of-date?

If I try to escape the $ with any other character (I'm just shooting in
the dark regarding possible escape characters, as I cannot find
definitive documentation that pertains to escaping $ in the dovecot
configuration), I receive yet another error:


doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf:
Namespace '': Hierarchy separator must be only one character long
doveconf: Error: managesieve-login: dump-capability process returned 89
doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf:
Namespace '': Hierarchy separator must be only one character long


Ultimately, I have two questions:

1.) Is the nesting structure that I've employed correct? The Wiki 2 page
is not clear with regard to the nesting; is it correct to put the
"namespace" block inside the "protocol imap" block, as I demonstrated above?

2.) Is it possible to escape the dollar sign so that it can be used as
the separator?

Full "doveconf -n" output is included below.

Thanks for any assistance,

-Ben



# doveconf -n
# 2.2.9: /etc/dovecot/dovecot.conf
doveconf: Fatal: Error in configuration file /etc/dovecot/dovecot.conf
line 104: Unknown variable: $
doveconf: Error: managesieve-login: dump-capability process returned 89
# OS: Linux 3.13.0-34-generic x86_64 Ubuntu 14.04.1 LTS
auth_mechanisms = plain login
disable_plaintext_auth = no
listen = *,[::]
log_timestamp = "%Y-%m-%d %H:%M:%S "
mail_debug = yes
mail_privileged_group = vmail
passdb {
  args = /etc/dovecot/dovecot-sql.conf
  driver = sql
}
plugin {
  antispam_backend = pipe
  antispam_debug_target = syslog
  antispam_pipe_program = /bin/bash
  antispam_pipe_program_args = /usr/local/bin/sa-learn-pipe.sh
  antispam_pipe_program_notspam_arg = --ham
  antispam_pipe_program_spam_arg = --spam
  antispam_pipe_tmpdir = /tmp
  antispam_spam_pattern_ignorecase = SPAM;JUNK
  antispam_trash_pattern_ignorecase = trash;Deleted *
  antispam_verbose_debug = 1
  quota = dict:user::file:/var/vmail/%d/%n/.quotausage
  quota_rule2 = Trash:storage=+100M
  quota_rule3 = Junk:ignore
  quota_rule4 = INBOX:storage=+100M
  quota_warning = storage=100%% quota-reached 100 %u %d
  quota_warning2 = storage=95%% quota-warning 95 %u %d
  quota_warning3 = storage=80%% quota-warning 80 %u %d
  quota_warning4 = -storage=100%% quota-below below %u %d
  sieve = /var/vmail/%d/%n/.sieve
}
postmaster_address = postmaster at localhost.com
protocols = imap pop3 sieve
service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
  unix_listener auth-userdb {
    group = vmail
    mode = 0600
    user = vmail
  }
  user = root
}
service config {
  unix_listener config {
    group = vmail
    mode = 0600
    user = vmail
  }
}
service imap-login {
  client_limit = 1000
  process_limit = 500
}
service quota-below {
  executable = script /usr/local/bin/quota-below.sh
  unix_listener quota-below {
    group = vmail
    mode = 0666
    user = vmail
  }
  user = vmail
}
service quota-reached {
  executable = script /usr/local/bin/quota-reached.sh
  unix_listener quota-reached {
    group = vmail
    mode = 0666
    user = vmail
  }
  user = vmail
}
service quota-warning {
  executable = script /usr/local/bin/quota-warning.sh
  unix_listener quota-warning {
    group = vmail
    mode = 0666
    user = vmail
  }
  user = vmail
}
ssl_cert = </etc/postfix/smtpd.cert
ssl_key = </etc/postfix/smtpd.key
userdb {
  args = /etc/dovecot/dovecot-sql.conf
  driver = sql
}
protocol imap {
  mail_plugins = quota imap_quota antispam listescape
  namespace {
    inbox = yes
    location =
    prefix =
    separator = $
    type = private
  }
}
protocol pop3 {
  mail_plugins = quota
  pop3_uidl_format = %08Xu%08Xv
}
protocol lda {
  info_log_path =
  log_path =
  mail_plugins = sieve quota
}