[Dovecot] dsync deleted my mailbox - what did I do wrong?

[Jiri Bourek]

Hi

>
> - where did I fail (ignoring the backups, please. That's .. something I
> know)

 From the man page: "backup - Backup mails from default mail location to 
location2 (or vice versa, if -R parameter is given). No changes are ever 
done to the source location. Any changes done in destination are discarded."

The last sentence describes what happened to you: all new mail on the 
new machine is a "change" and was discarded (by deleting new mail.) If 
I'm not mistaken, this is correct behaviour for backup mode - you get 
exact copy of the source side (maildir:/tmp/mail_backup) on destination 
side (dar at darklajid.de)

>
> - Can I use dsync ... for backups? I don't think that this is a good
> idea after yesterday night?

AFAIK you can safely use it to make the backup. I'm not sure if it can 
be reliably used to restore data (don't think so but I'm not an expert.) 
I'd use doveadm import for that.