> On 16/05/2026 21:15 EEST Bryan Simmons via dovecot <[email protected]> > wrote: > > > Was able to execute the process as root with "doveadm -D backup -Ru tst > tcp:10.0.1.212:12354" after updating some destination side configuration > options that do not appear to be documented in the link provided, but there > are a few errors that I am unable to understand or correct. > > 1. Debug: open(/proc/self/io) failed: Permission denied - This file is read > only for root and permissions cannot be modified.
You can ignore this, it's a debug message. It's only relevant if you need io statistics. > 2. Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted. > - Not sure why a mailbox would need to be deleted other than the backup is > using a delete and recreate to retain only current emails, assuming this is > on the destination server. > 3. All emails for tst account are deleted from the source server - This is a > significant issue when only copies should be made for a backup. > > Full log is attached. > > Any additional insights would be greatly appreciated, Bryan > > I'm guessing you ran the backup command on source server. You should not use -R then, only use -R if you use it from destination server. doveadm backup copies *from* account *to* target. If you use -R it will copy *to* account *from* target*. Hope this helps. Aki > May 15, 2026 10:01 AM, "Aki Tuomi" <[email protected]> wrote: > > > Yeah, you can do migration with dsync or imap between 2.3 and 2.4 > > > > Aki > > > >> On 15/05/2026 16:10 EEST Bryan Simmons <[email protected]> wrote: > >> > >> Aki, > >> > >> Thank you for the guidance. Just to confirm, doveadm/imap based > >> migration is the section under "Migrating Mailboxes from Another Dovecot > >> Server" in the link referenced below since this migration will be > >> between servers? > >> > >> Seems an upgrade from dovecot 2.3.21 (current version on source server) > >> to 2.4.2 (installed version on the destination server) would be > >> appropriate before migrating any user accounts based on information from > >> some of the other posts regarding migration. > >> > >> Thanks , Bryan > >> > >> On 5/13/26 13:41, Aki Tuomi via dovecot wrote: > >> On 13/05/2026 20:31 EEST Bryan Simmons via dovecot <[email protected]> > >> wrote: > >> > >> Moving postfix and dovecot to a new server including all current users > >> and emails. There exists several dovecot files in each user mail > >> directory: > >> > >> dovecot.index > >> dovecot.index.cache > >> dovecot.index.log > >> dovecot-keywords > >> dovecot.list.index.log > >> dovecot.mailbox.log > >> dovecot-uidlist > >> dovecot-uidvalidity > >> dovecot-uidvalidity.612d3d34 > >> > >> Should these files be migrated also or will dovecot recreate them as > >> needed? > >> > >> Thank you, Bryan > >> > >> https://doc.dovecot.org/2.4.4/core/admin/migration.html#migrating-mailboxes > >> > >> I would recommend seeing this. Depending on your mailbox format, it can be > >> important that those > >> files are copied, but I would suggest doveadm/imap based migration. > >> > >> Aki > >> > >> _______________________________________________ > >> dovecot mailing list -- [email protected] > >> To unsubscribe send an email to [email protected] > _______________________________________________ > dovecot mailing list -- [email protected] > To unsubscribe send an email to [email protected] _______________________________________________ dovecot mailing list -- [email protected] To unsubscribe send an email to [email protected]
