dovecot - Oct 2020 - doveadm sync usage ; root INBOX unsynced

Hi,

I am trying to import a mail IMAP account using doveadm.

Following
https://serverfault.com/questions/605342/migrating-from-any-imap-pop3-server-to-dovecot

I did it with:

doveadm -D -v  \
	-o imapc_host=mail.oldserver.tld \
	-o imapc_user=contact at domain.org \
	-o imapc_password=xxxxxxx \
	-o imapc_features=rfc822.size \
	-o imapc_ssl=starttls \
	-o ssl_client_ca_file=/etc/ssl/certs/ca-certificates.crt \
	-o mail_fsync=never \
	sync -1 -R -u contact at domain.org imapc: 

Btw I am facing with exactly the same error than:
https://serverfault.com/questions/960264/doveadm-backup-doesnt-transfer-mail-from-root-inbox

I.e. it works fine for all subfolders, but the root INBOX stay empty on
the new server.

Those debug messages tell me something seems wrong with INBOX root but
I am unable to understand them: 

dsync(contact at domain.tld): Debug: brain M: Local mailbox tree: INBOX
guid=deadbeefdeabbeefdeadbeefdeabbeef uid_validity=1604137198 uid_next=1 subs=no
last_change=0 last_subs=0
dsync(contact at domain.tld): Debug: brain S: Remote mailbox tree: INBOX
guid=deadbeefdeabbeefdeadbeefdeabbeef uid_validity=1604137198 uid_next=1 subs=no
last_change=0 last_subs=0
dsync(contact at domain.tld): Debug: brain M: Mailbox INBOX:
local=deadbeefdeabbeefdeadbeefdeabbeef/0/1,
remote=00000000000000000000000000000000/0/0: mailbox not selectable yet
dsync(contact at domain.tld): Debug: brain S: Mailbox INBOX:
local=00000000000000000000000000000000/0/0,
remote=deadbeefdeabbeefdeadbeefdeabbeef/0/1: mailbox not selectable yet
dsync(contact at domain.tld): Debug: brain S: Ignore nonexistent mailbox GUID
deadbeefdeabbeefdeadbeefdeabbeef with -1 sync
dsync(contact at domain.tld): Debug: brain S: We don't have mailbox
deadbeefdeabbeefdeadbeefdeabbeef
dsync(contact at domain.tld): Debug: brain M: Change during sync: Remote lost
mailbox GUID deadbeefdeabbeefdeadbeefdeabbeef (maybe it was just deleted?)
dsync(contact at domain.tld): Warning: Mailbox changes caused a desync. You may
want to run dsync again: Remote lost mailbox GUID
deadbeefdeabbeefdeadbeefdeabbeef (maybe it was just deleted?)

Does someone have on hint?

Best regards.
Fran?ois

-- 
Fran?ois Poulain <fpoulain at metrodore.fr>

Le Sat, 31 Oct 2020 13:36:32 +0100,
Fran?ois Poulain <fpoulain at metrodore.fr> a ?crit :
> Does someone have on hint?
I tried to remove all dirs and re-start using doveadm backup as did in
https://dovecot.org/pipermail/dovecot/2019-December/117963.html but it
didn't worked better.

Fran?ois  

-- 
Fran?ois Poulain <fpoulain at metrodore.fr>

Le Sat, 31 Oct 2020 13:36:32 +0100,
Fran?ois Poulain <fpoulain at metrodore.fr> a ?crit :
> I am trying to import a mail IMAP account using doveadm.
Am I wrong trying to do so?

Best regards.
Fran?ois

-- 
Fran?ois Poulain <fpoulain at metrodore.fr>

>>>>> "Fran?ois" == Fran?ois Poulain <fpoulain at
metrodore.fr> writes:
Fran?ois> Le Sat, 31 Oct 2020 13:36:32 +0100,
Fran?ois> Fran?ois Poulain <fpoulain at metrodore.fr> a ?crit :
>> I am trying to import a mail IMAP account using doveadm.
Fran?ois> Am I wrong trying to do so?

I think so.  Have you tried 'imapsysnc' or other imap downloading tools?

> On 31. Oct 2020, at 16.19, Fran?ois Poulain <fpoulain at
metrodore.fr> wrote:
> 
> Le Sat, 31 Oct 2020 13:36:32 +0100,
> Fran?ois Poulain <fpoulain at metrodore.fr> a ?crit :
> 
>> Does someone have on hint?
> 
> I tried to remove all dirs and re-start using doveadm backup as did in
> https://dovecot.org/pipermail/dovecot/2019-December/117963.html but it
> didn't worked better.

So if you delete *everything* from the target server and start from scratch with
"doveadm backup" it still fails to sync INBOX? 

Can you collect debug logs and possibly imapc rawlogs from such session?

Sami