> On 30 Sep 2019, at 14.07, tovises via dovecot <dovecot@dovecot.org> wrote:
> Tath's help! But something still missing :(
> 
> $ sudo doveadm -D -o imapc_user=tovis -o imapc_password=<password> -o
> imapc_host=nusi -R -u tovis imapc:
> 
> Exited with messages (excerption - too many private information exposed):
> 
> dsync(tovis): Debug: brain M: Mailbox INBOX.threatposts:
> local=00000000000000000000000000000000/0/0,
> remote=a557d4d9d858c0ceceef5cd10a973bdc/0/1: mailbox not selectable yet
> dsync(tovis): Debug: brain M: Mailbox INBOX.todo:
> local=00000000000000000000000000000000/0/0,
> remote=891e2fe9dc8874c0a19e496acf802566/0/1: mailbox not selectable yet

Remote (courier) refuses A SELECT INBOX.threatpost and A SELECT INBOX.todo

> dsync(tovis): Debug: brain M: Deleting mailbox 'INBOX' (GUID
> 2e829f01d5cc915dd103000056dcb805): UIDVALIDITY changed (1454614013 ->
> 1569836245)
> dsync(tovis): Error: Mailbox INBOX sync: mailbox_delete failed: INBOX
> can't be deleted.

IMAP RFC mandates that if UIDVALIDITY changes then the whole mailbox needs to 
be resynced.
Dovecot then tries to delete INBOX for resync, but INBOX deletion is not 
allowed.

The only way to recover is to clear out the target completely and restart from 
beginning.

btw, 1454614013 = Thu Feb  4 20:26:53 CET 2016
and  1569836245 = Mon Sep 30 11:37:25 CEST 2019

so did you actually create INBOX on target system before the initial sync?

Sami

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