> On 27/12/2023 11:33 EET lutzn via dovecot wrote:
>
>
> Hi!
>
> Due to a fatal hardware error we have to extract data of all existing imap
> accounts and all their boxes/folders etc. from an mdbox store starting with
> the 5th of december until today. Then we have to restore the old system and
> import the data back into it. Mail before 5th will come from the system
> backup, newer mail from that export. After that it may be possible that
> some/few mails may exist twice in the boxes, but that's ok.
>
> 1. What would be the command line for doveadm to extract everything starting
> the 5th? I find that the command line for doveadm is pretty complicated. I
> tried but I am not sure if I really got all mails exported. So I would like
> to ask if someone with much more experience can give me a command line that
> surely does what we want. The command will be run from a remote machine.
>
You can use doveadm import to specify search, using doveadm-search-query(7). Be
careful though, import is not re-entrant, and will happily import same mails
again.
> 2. And what would be the command line to restore all the mails that we have
> exported back into the system? (The folder and account structure is the
> same.)
>
doveadm sync is probably best tool for this.
> 3. After that some of the mails may exist twice. Is that a problem, maybe
> because of internal IDs?
>
If duplicates appear, you can try using doveadm deduplicate.
> 4. Are there any other things we need to be aware of when doing that?
>
> I thank you very much for your help!
>
> Cheers!
> -lutzn
>
>
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Aki
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