On 11/20/2014 09:46 AM, Michael Menge wrote:
> If i remember correctly the dovecot data files use the mbox format.
> There are some tools that can upload mails from mbox files to IMPA
> Servers. But i don't know if it is possible to convert all mailbox
> features with them (ACLs, seen status for shared mailboxes).
>
Dovecot by default stores mail in Maildir format, but is compatible with
mbox; i.e. you can have Maildir and /var/spool/mail/{mbox} users.
If your mail is stored with multiple messages per file, then it's mbox;
if it's one message per file, it's Maildir.
I think the least painful way to do this migration is to use imapsync
(http://imapsync.lamiral.info/)
(There might be other versions of imapsync; I haven't used it in a while.)
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