Hi all,

I'm configuring a public namespace for an existing Dovecot install, I have the 
public namespace configured and working in a basic manner (it can be subscribed 
to in an MUA and mail can be moved into it for a specified user named in the 
dovecot-acl file).

I've followed the official docs:

- 
https://doc.dovecot.org/2.3/configuration_manual/shared_mailboxes/public_shared/#subscriptions

When I configure the MUA (Thunderbird) I can see the public namespace and a 
subfolder that I've manually created underneath (with new/cur/tmp folders, 
parent public folders also has a new tmp cur directories, mail cannot be moved 
into public top level folder), but it is displayed as below when subscribed to:

public^subfolder

I've resolved this by changing the separator to a / , however as per my 
doveconf -n below I then received a separator conflict, which I resolved by 
changing the separator for the default namespace to also be a / . As the 
default namespace is already using period ( . ) on the production servers, I'd 
like to continue using this separator and not / separator. The existing install 
of a couple of hundred mailboxes and I'm concerned I'll break the mailboxes 
/any existing sieve filters.

I would like the public folder to display with an empty prefix as below, but I 
understand you cannot have two 'prefix =' (empty prefixes) :

subfolder

doveconf -n output below:

# 2.3.21.1 (d492236fa0): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.21.1 (49005e73)
# OS: Linux 5.10.0-35-cloud-amd64 x86_64 Debian 11.11 
# Hostname: imap-server.hostname.co.uk
auth_verbose = yes
default_vsz_limit = 0
doveadm_password = # hidden, use -P to show it
first_valid_gid = 8
first_valid_uid = 8
last_valid_gid = 8
last_valid_uid = 8
lda_mailbox_autocreate = yes
lda_mailbox_autosubscribe = yes
mail_gid = 8
mail_location = maildir:~/Maildir
mail_plugins = " notify replication acl"
mail_uid = 8
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 editheader imapflags
namespace {
  list = no
  location = maildir:/srv/vmail/public:INDEXPVT=~/Maildir/public
  prefix = Public/
  separator = /
  subscriptions = no
  type = public
}
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
  separator = /    <--- I'd like this to be a . instead
}
namespace subscriptions {
  hidden = yes
  list = no
  location = 
  prefix = subscriptions/ <--- had to put something here because inbox 
namespace was empty
  subscriptions = yes
}
passdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
}
plugin {
  acl = vfile
  mail_replica = tcps:other-replica.domain.co.uk:port number
  sieve = ~/.dovecot.sieve
  sieve_before = /etc/dovecot/common.sieve
  sieve_dir = ~/sieve
  sieve_extensions = +editheader +imapflags
}
postmaster_address = [email protected]
protocols = " imap sieve pop3"
replication_dsync_parameters = -d -N -l 15 -U -T 10
replication_max_conns = 24
service aggregator {
  fifo_listener replication-notify-fifo {
    user = mail
  }
  unix_listener replication-notify {
    user = mail
  }
}
service auth {
  unix_listener /var/run/dovecot-exim-bridge {
    mode = 0660
    user = Debian-exim
  }
}
service doveadm {
  inet_listener {
    port = <replica port number>
    ssl = yes
  }
}
service imap-login {
  inet_listener imap {
    port = 143
  }
  inet_listener imaps {
    port = 993
    ssl = yes
  }
  process_limit = 512
  process_min_avail = 4
  service_count = 1
}
service imap {
  process_limit = 1024
}
service managesieve-login {
  inet_listener sieve {
    port = <port number>
  }
  process_min_avail = 1
  service_count = 8
  vsz_limit = 256 M
}
service managesieve {
  process_limit = 1024
}
service replicator {
  process_min_avail = 1
  unix_listener replicator-doveadm {
    mode = 0666
  }
}
ssl = required
ssl_cert = <path/to/fullchain.pem
ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL
ssl_client_ca_dir = /etc/ssl/certs
ssl_key = # hidden, use -P to show it
userdb {
  args = /etc/dovecot/dovecot-ldap.conf.ext
  driver = ldap
  override_fields = home=/var/mail/%u uid=mail gid=mail
}
protocol lda {
  mail_plugins = " notify replication acl sieve"
}
protocol imap {
  mail_max_userip_connections = 32
  mail_plugins = " notify replication acl acl"
}
protocol sieve {
  mail_max_userip_connections = 10
  managesieve_logout_format = bytes=%i/%o
  managesieve_max_line_length = 64 k
}

Also the public folder is not displayed in Roundcube webmail in folder sections 
to be subscribed to.

doveadm mailbox list -u <username>

I appreciate that replication does not work with public mailboxes, I'll have to 
look at that further.

Many thanks

Dan
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