Hello An update: I managed to sync mailboxes between the 2 servers using imapsync, which worked perfectly.
I suspect there's a bug lurking in the imapc code, because why would an external utility work flawlessly with 2 dovecot servers, but dovecot's own syncing client won't? Regards Dale On 6 August 2015 at 12:10, Dale Gallagher <dale.gallag...@gmail.com> wrote: > Hello > > Could my previously reported error above have something to do with the > IMAP path prefix? It's not configured on either of the previously mentioned > servers. > > I see a similar error, which may be related, when trying to sync using > offlineimap.py: > > Folder INBOX [acc: test_account]: > ERROR: ERROR in syncfolder for test_account folder INBOX > > Thanks > Dale > > > On 5 August 2015 at 16:59, Dale Gallagher <dale.gallag...@gmail.com> > wrote: > >> Hello >> >> I have 2.2.18 built with: >> >> ./configure \ >> --prefix="$prefix" \ >> --bindir="$prefix/bin" \ >> --sbindir="$prefix/bin" \ >> --sysconfdir="/etc" \ >> --with-storages="maildir,imapc,pop3c" \ >> --without-vpopmail \ >> --without-ldap >> >> I'm attempting to sync (backup) from another Dovecot server running >> version 2.0.21: >> >> Both servers don't have no explicit namespaces configured and both are >> using the Maildir storage plugin. >> >> doveadm -Dv -o imapc_user=remote_user -o imapc_host=source.host -o >> imapc_port=993 -o imapc_ssl=imaps -o imapc_password=remote_pass -o >> imapc_features="rfc822.size fetch-headers" backup -R -u local_user imapc: >> >> All seems to go well, showing local and remote mailbox syncing without >> errors, then finally: >> >> dsync(mcg): Debug: brain M: Deleting mailbox 'INBOX' (GUID >> 59023c2a911dc255842b0000d09efc50): UIDVALIDITY changed (1355416734 -> >> 1438784913) >> dsync(mcg): Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't >> be deleted. >> >> No mail is synced to the local server (2.2.18) after this error halts >> execution. >> >> What should I be looking for, in terms of possible causes of this error? >> >> I've tried syncing on a completely fresh mailbox, which hasn't been >> accessed by a mail client and the same error occurs. >> >> I've seen similar reports of this error before, without clear solutions / >> suggestions. >> >> Help would be greatly appreciated. >> >> Thanks >> >> >> >> >