dovecot - Jan 2014 - Dovecot doesn't seem to report all subfolders to Thunderbird

Hi,

I've recently migrated my emails from a Yahoo account to my own
mailserver on a VPS.

Ever since then, Thunderbird seems to have issues with the mailbox's
directory structure: When I start Thunderbird, it immediately deletes
the local copies of all 3rd-level folders (i.e. subfolders of a
subfolder of a folder in the mailbox root).
Since that didn't happen with the Yahoo account, I assume it's some kind
of error or misconfiguration of Dovecot.

Here's an example of the mailbox structure:
voidptr.de
'-> University
    '-> IEEE
        '-> Conference
"University" and "IEEE" work without problems, but
"Conference" gets
deleted locally every time I start Thunderbird. When I collapse and
re-expand "University" in the folder panel, all subfolders (including
"Conference") reappear, but Thunderbird has to re-download the
contents
of "Conference", since it deleted the local copies earlier.

It looks as if Dovecot only reported the topmost two folder levels when
Thunderbird requests a folder list...

Is there any way I can change that behavior?

Nils



$ doveconf -n
# 2.1.7: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-042stab078.22 x86_64 Debian 7.3
auth_verbose = yes
mail_location = maildir:~/Maildir:LAYOUT=fs
namespace {
  inbox = yes
  location   mailbox Drafts {
    auto = subscribe
    special_use = \Drafts
  }
  mailbox Junk {
    auto = subscribe
    special_use = \Junk
  }
  mailbox Sent {
    auto = subscribe
    special_use = \Sent
  }
  mailbox Trash {
    auto = subscribe
    special_use = \Trash
  }
  prefix   subscriptions = yes
}
passdb {
  args = scheme=SHA512-CRYPT username_format=%n /etc/dovecot/users
  driver = passwd-file
}
protocols = " imap"
service auth {
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
  }
}
service imap-login {
  inet_listener imaps {
    port = 0
  }
}
ssl = required
ssl_cert = </etc/ssl/certs/own/voidptr.de.pem
ssl_key = </etc/ssl/certs/own/voidptr.de.key
userdb {
  args = username_format=%n /etc/dovecot/users
  default_fields = home=/home/%n
  driver = passwd-file
}

Am 18.01.2014 15:12, schrieb dovecot at voidptr.de:
> Hi,
> 
> I've recently migrated my emails from a Yahoo account to my own
> mailserver on a VPS.
> 
> Ever since then, Thunderbird seems to have issues with the mailbox's
> directory structure: When I start Thunderbird, it immediately deletes
> the local copies of all 3rd-level folders (i.e. subfolders of a
> subfolder of a folder in the mailbox root).
> Since that didn't happen with the Yahoo account, I assume it's some
kind
> of error or misconfiguration of Dovecot.
> 
> Here's an example of the mailbox structure:
> voidptr.de
> '-> University
>     '-> IEEE
>         '-> Conference
> "University" and "IEEE" work without problems, but
"Conference" gets
> deleted locally every time I start Thunderbird. When I collapse and
> re-expand "University" in the folder panel, all subfolders
(including
> "Conference") reappear, but Thunderbird has to re-download the
contents
> of "Conference", since it deleted the local copies earlier.
> 
> It looks as if Dovecot only reported the topmost two folder levels when
> Thunderbird requests a folder list...
> 
> Is there any way I can change that behavior?
> 
> Nils
> 
> 
> 
> $ doveconf -n
> # 2.1.7: /etc/dovecot/dovecot.conf
> # OS: Linux 2.6.32-042stab078.22 x86_64 Debian 7.3
> auth_verbose = yes
> mail_location = maildir:~/Maildir:LAYOUT=fs
why LAYOUT=fs ?, try without



http://wiki2.dovecot.org/MailboxFormat/Maildir

Directory Structure

By default Dovecot uses Maildir++ directory layout for organizing
mailbox directories. This means that all the folders are directly inside
~/Maildir directory:

    ~/Maildir/new, ~/Maildir/cur and ~/Maildir/tmp directories contain
the messages for INBOX. The tmp directory is used during delivery, new
messages arrive in new and read shall be moved to cur by the clients.

    ~/Maildir/.folder/ is a mailbox folder

    ~/Maildir/.folder.subfolder/ is a subfolder of a folder (ie.
"folder/subfolder")

You can also optionally use the "fs" layout by appending :LAYOUT=fs to
mail_location. This makes the folder structure look like:

    ~/Maildir/new, ~/Maildir/cur and ~/Maildir/tmp directories contain
the messages for INBOX, just like with Maildir++.

    ~/Maildir/folder/ is a mailbox folder

    ~/Maildir/folder/subfolder/ is a subfolder of a folder

or use

http://wiki2.dovecot.org/Clients?highlight=%28thunderbird%29

Thunderbird

    If you're using mbox, dbox or Maildir with :LAYOUT=fs ,

        You should enable tb-extra-mailbox-sep workaround for IMAP.

> namespace {
>   inbox = yes
>   location >   mailbox Drafts {
>     auto = subscribe
>     special_use = \Drafts
>   }
>   mailbox Junk {
>     auto = subscribe
>     special_use = \Junk
>   }
>   mailbox Sent {
>     auto = subscribe
>     special_use = \Sent
>   }
>   mailbox Trash {
>     auto = subscribe
>     special_use = \Trash
>   }
>   prefix >   subscriptions = yes
> }
> passdb {
>   args = scheme=SHA512-CRYPT username_format=%n /etc/dovecot/users
>   driver = passwd-file
> }
> protocols = " imap"
> service auth {
>   unix_listener /var/spool/postfix/private/auth {
>     mode = 0666
>   }
> }
> service imap-login {
>   inet_listener imaps {
>     port = 0
>   }
> }
> ssl = required
> ssl_cert = </etc/ssl/certs/own/voidptr.de.pem
> ssl_key = </etc/ssl/certs/own/voidptr.de.key
> userdb {
>   args = username_format=%n /etc/dovecot/users
>   default_fields = home=/home/%n
>   driver = passwd-file
> }
> 


Best Regards
MfG Robert Schetterer

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