dovecot - Feb 2011 - dsync problem: Error: Can't rename mailbox INBOX

Hi all,

I'm running two debian machines with dovecot 2.0.9 autobuilds and would like
to keep mails synchronized on both via dsync.
Mails are kept in maildir on both sides.
While syncing, dsync gives the following error:

dsync-local(jan.binder): Error: Can't rename mailbox INBOX to
INBOX_a432bf2eca595a4dba47000043b078f4: Renaming INBOX isn't supported.
dsync-local(jan.binder): Error: Can't rename mailbox
INBOX_e184273887675a4dcc5b00000c16d079 to INBOX: Target mailbox already exists

Further diagnostic information:
dsync command:
dsync -D -v -f mirror ssh jan.binder at firefly.local dsync

dovecot -n on firefly.local:
# 2.0.9 (159605040ec0): /etc/dovecot/dovecot.conf
# OS: Linux 2.6.37-trunk-686-bigmem i686 Debian wheezy/sid 
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
passdb {
  driver = pam
}
plugin {
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/sieve
}
protocols = imap lmtp
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_key = </etc/ssl/private/dovecot.pem
userdb {
  driver = passwd
}

dovecot -n on depth.local:
# 2.0.9 (049a922c193c): /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-5-amd64 x86_64 Debian wheezy/sid 
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
passdb {
  driver = pam
}
plugin {
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/sieve
}
protocols = imap lmtp
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_key = </etc/ssl/private/dovecot.pem
userdb {
  driver = passwd
}

Should this usage of dsync work in principle?

Best regards,
Jan Binder

On Thu, 2011-02-17 at 14:25 +0100, Jan Binder wrote:
> dsync-local(jan.binder): Error: Can't rename mailbox INBOX to
INBOX_a432bf2eca595a4dba47000043b078f4: Renaming INBOX isn't supported.
> dsync-local(jan.binder): Error: Can't rename mailbox
INBOX_e184273887675a4dcc5b00000c16d079 to INBOX: Target mailbox already exists
Syncing INBOX is a bit weak point with dsync currently. Basically the
problem is that the local and remote INBOX has a different mailbox GUID,
so dsync treats them as different mailboxes that have a naming conflict.
The usual way to resolve this by renaming doesn't work, because INBOX
can't be renamed.

You should be able to solve this by deleting the INBOX manually from the
other side and letting dsync create it again with the proper GUID. What
mailbox format do you use? I don't see mail_location in your settings.